The Stovebolt Site Forums The Parking Lot Big Bolts 1955.2 GMC 350, Cummins fit in?

Fixing the old truck

BUSY BOLTERS
Are you one?

The Shop Area

continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.

See what you're missing.

Searching the Site - a click away

New here ??? Where to start?

Click on image for the lowdown.

====

Who's Online Now

0 members (), 433 guests, and 1 robot.

Key: Admin, Global Mod, Mod

Forum Statistics

Forums66

Topics126,777

Posts1,039,270

Members48,100

Most Online2,175
Jul 21st, 2025

Step-by-step instructions for pictures in the forums

Print Thread

1955.2 GMC 350, Cummins fit in? #880545 09/06/2012 12:20 AM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	Anyone know if you can fit a 12 valve cummins in my 1955.2 GMC 350? Also I want to install newer better axles, any ideas? 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #880565 09/06/2012 8:25 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	You can fit an 8 valve 4BT quite easily. The 6 cyl is extremely tight and requires a lot of compromises/work. Newer axles http://www.stovebolt.com/techtips/bigbolts/p30swap/ Another possibly better idea for front disc brakes on original axle. https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=725572#Post725572 Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #880748 09/06/2012 11:36 PM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	wow cool! THanks! 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #881715 09/10/2012 9:38 PM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	Anyone know if the 55.2 GMC 350 front axle is similar to the big AD trucks? Last edited by beast54; 09/10/2012 10:34 PM. 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #881798 09/11/2012 8:21 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	Check kingpin dimensions, should be easy to look up in your shop manual. The 2 ton AD trucks have a 1.109" diameter kingpin. Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #882032 09/11/2012 10:23 PM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	Hmmm I need to get one of those. 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #882035 09/11/2012 10:27 PM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	Hey Grigg... Tell me about your Detroit 4-53T.. I'm curious 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #882080 09/12/2012 6:16 AM
Joined: Nov 2000 Posts: 1,393 Dayton, Maryland. USA B Bill Marlow Camp Commandant
Bill Marlow Camp Commandant B Joined: Nov 2000 Posts: 1,393 Dayton, Maryland. USA	What more do you need to know!! Sorry Grigg, I couldn't help myself. Still two of my most favorite videos. I'm sure he will be a long to respond but the whole history is here, https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=876451&page=1 ~ Billy Old Dominion Stovebolt Society: Exotic Animal Division 1946 Chevrolet Cab Over Engine \| In the Gallery \| Video \| More pictures 1959 GMC 860 \| Pictures 1950 GMC 450 Flatbed W/W, Air Brake equipt (25% Owner) \| Pictures 1950 Chevrolet 3800 \| Pictures I've got a trailer and I'm not afraid to use it!

Re: 1955.2 GMC 350, Cummins fit in? Bill Marlow #882092 09/12/2012 8:44 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	That pretty much covers my swap. About swapping a 4-53T into an AD truck, I think it's as big as I'd ever want to do, it fits but sure is tight. A 3-53T would be a much simpler swap, and one I have planned for my 52 1 ton pickup. Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #882123 09/12/2012 10:57 AM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	I watched those videos. Took me by surprise on what jumped out of the trees! I couldn't help but chuckle a little bit! That's pretty cool I must say. I don't know much about diesels, thats why the questions. what do the Detroits come out of? 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #882144 09/12/2012 12:13 PM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	One came out of a 1978 GMC 6500, the one I replaced it with was new in 1985, still new surplus likely intended for stationary equipment. Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #882276 09/13/2012 12:05 AM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	So is it a 4 cylinder? What's your HP and torque? Mpg? 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #882310 09/13/2012 8:17 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	The newest Silver 4-53T puts out 185 HP at 2500 rpm and 435 ft lb at 1,500 RPM. don't have a real MPG figure yet, with a 7,000-8,000 lb truck I'd hope to see 15-18 mpg. Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #882322 09/13/2012 10:01 AM
Joined: Mar 2011 Posts: 667 Texas T Tango Shop Shark
Tango Shop Shark T Joined: Mar 2011 Posts: 667 Texas	Hey Grigg --- sounds mighty interesting. Had an old 6V53 (supercharged) in a Blue Bird...is the "T" designation for "Turbo" by any chance? Any pix of that motor? Also, while I'm not familiar with the Detroits, I do know that modding a stationary engine to over-the-road use can be very tricky with any of the Cummins line. The are set up very differently. 1946 1.5-Ton Chevy Shorty Bus In the Stovebolt Gallery Tango's 1946 Chevy "Skoolie" Project All my best --- Tango

Re: 1955.2 GMC 350, Cummins fit in? Tango #882339 09/13/2012 10:52 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	Try the "Click here for all pictures" link in my signature. Yep, the T is for Turbo. I had a 6V53 with twin turbos in a 61 F350, that was quite a truck! Making a stationary Detroit into a vehicle engine is a quite simple, just change the governor to a limiting speed type if it's not already. Likely you will change oil pickup and sump but not always necessary, and find a flywheel for an automotive clutch. Detroits are quite simple and easy to work on, and the service manual is very well done. Grigg •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #883189 09/17/2012 1:06 AM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	Hey Grigg, is there other trucks other than the p-30 that have the 1.109 kingpin with disk brakes that will work? 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #883247 09/17/2012 11:08 AM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	Im condused... the P30 has larger than 1.109" kingpins. Nothing I know of has 1.109" kingpins and disc brakes. What are you trying to do? Did you checkout the disc brake sticky? •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Re: 1955.2 GMC 350, Cummins fit in? Grigg #883943 09/21/2012 10:52 AM
Joined: Sep 2004 Posts: 201 Preston Idaho B Beast57 'Bolter
Beast57 'Bolter B Joined: Sep 2004 Posts: 201 Preston Idaho	I looked and i thought i read that if you had the 1.109 kingpin that there are disk brakes you can bolt on . 1955.1 Chevy 3600 NAPCO Truck In the Gallery 1957 Chevy 6400 US FOREST SERVICE Here's a long list of all my STUFF!

Re: 1955.2 GMC 350, Cummins fit in? Beast57 #884045 09/21/2012 10:36 PM
Joined: May 2005 Posts: 8,877 Lexington, VA G Grigg .
Grigg . G Joined: May 2005 Posts: 8,877 Lexington, VA	Sort of, still takes some work. The P30 shares brake parts with the 3500HD. Check out the sticky disc brake thread again as it has what I know about them. •1951 GMC 250 in the Project Journals •1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes •1952 Chevrolet 3800 pickup ---All pictures--- "First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Moderated by 69Cuda, Super55

Hop To

Link Copied to Clipboard