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cummins 5.9 or chevy ls 5.3 or 6.0
#1372562 Sat Aug 08 2020 04:23 PM
Joined: Dec 2014
Posts: 160
29tons Offline OP
Shop Shark
If you were going to buy a coe would you prefer a chevy 5.3 or 6.0 ls engine or a cummins 5.9 in a 1941 chevy coe trying to get ideas.

Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1372570 Sat Aug 08 2020 06:01 PM
Joined: Oct 2005
Posts: 2,994
"Hey! I sound like Darth Vader!!
I'd mount it on a 7400 with a Maxforce and an Alison. But, then again, I have bunches of those around.

Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1372573 Sat Aug 08 2020 06:40 PM
Joined: Jun 2011
Posts: 3,630
Shop Shark
Cummins have been mounted with the back end sticking out behind the cab to provide room for I'cooler, proper water radiator, very tight quarters no matter what one chooses.

Gassers can be mounted farther fwd.

Either way, such things as a disc brake axle, power steering, adequite cooling, engine noise, engine heat, air condidioning?, present challenges. '41 to '47 same body style.

With engine under cab, short engine compartment problems('41-'59) are not a problem.


Last edited by EdPruss; Sun Aug 09 2020 01:12 PM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1372586 Sat Aug 08 2020 10:33 PM
Joined: May 2001
Posts: 1,524
Shop Shark
The Cummins would be eye-popping. The sound would draw attention. I once saw an AD with one but I didn't get pictures.

I'm prejudiced, though, since we have a 2001 D*dge/Cummins.

Last edited by Wally / Montana; Sat Aug 08 2020 10:36 PM.

1948 3/4-Ton 5-Window Flatbed Chevrolet []

28 Years of Daily Driving but now on hiatus. With a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1372605 Sun Aug 09 2020 03:59 AM
Joined: Apr 2005
Posts: 2,612
Shop Shark
What are you going o use the truck for? If a lugging hauler the diesel is the better choice. If a light hauler or cruiser the LS is the better. People deride the LS but if it is going to be a USER then go with something that is everywhere, parts are cheap and in every FLAPS, and people that know how to work on them are plentiful. When we raced we used a sbc engines and 9 inch Ford rear ends because parts, help, or knowledge was never more than a few steps away. Practical beats unique every time for a DRIVER.

Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1373596 Sun Aug 16 2020 03:00 PM
Joined: Mar 2008
Posts: 1,988
Shop Shark
I`m going to go with the 6.0 LS or 5.3 on this one. I've never been a "LS swap everything" guy, but they do make better sense in my opinion. No matter what kind of diesel you prefer, they are ALL big and heavy. Even the 12V/6bt. By the time you install a bigger radiator, intercooler, intercooler piping, etc... How much room do you have left? That tunnel in your floor might get quite large. Heck, even the old gasser in the COE trucks had updraft manifolds and carbs to make extra space. If you're looking at horsepower and torque numbers, the only thing a 6BT has over a 6.0 is low end torque. The 6.0 has a longer, higher RPM power and torque curve than the 6BT, in my opinion, it's the better choice. If you start looking at the 24V Cummins, things start getting more complicated, oh and like I said before, you'll be losing a ton of real estate. If you're looking at aftermarket parts and support, sure the Cummins is popular, but the LS is king of the aftermarket. Anyhow, my $.02, the 6.0 has the best of everything, towing, performance, aftermarket support.

1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
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Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1373663 Sun Aug 16 2020 10:05 PM
Joined: Oct 2019
Posts: 250
Shop Shark
If your going to use a Cummins I’d recommend the 4BT, the 6BT is far too long for the engine bay of a 41.

Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1373667 Sun Aug 16 2020 10:19 PM
Joined: Aug 2020
Posts: 59
Wrench Fetcher
Or the Cummins 2.8 repower kit

Last edited by AwDang; Sun Aug 16 2020 10:20 PM.

1940’s tech was great in the 40’s
Re: cummins 5.9 or chevy ls 5.3 or 6.0
29tons #1373877 Tue Aug 18 2020 02:30 AM
Joined: Jul 2019
Posts: 329
Shop Shark
Get a bone stock 4.8 or 5.3 and you will be more than happy for a driver. Plenty of power and super quiet and dependable. I bolted my 144k 5.3 in a year ago and it still had stock plugs and wires on it. Ran like a champ and still got mid 20’s mpg. I finally broke down and threw some plugs in it though hahaha.

Re: cummins 5.9 or chevy ls 5.3 or 6.0
AwDang #1374133 Thu Aug 20 2020 10:42 AM
Joined: Aug 2007
Posts: 1,897
Grumpy old guy playing with trucks, cars, and boats
Originally Posted by AwDang
Or the Cummins 2.8 repower kit
the 2.8 is designed for things like a jeep, not a COE hauler

for a hauler, I would be looking for a 6.0, 6.2, or building something a bit stout.

cant go wrong with a 6B, or even a modded 4BTAA

The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
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