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#51689 - Sun Oct 30 2005 05:11 PM 302 GMC six  
ttodd  Offline
Shop Shark
Joined: Feb 2005
Posts: 561
Mo. Ozarks
I have found some 302 gmc motor out of some WW ll duck type trucks. there are several of these. Will the military motors work with regular chevy an gmc parts. Most of these motors run good what would they be worth.

Thanks Tony



#51690 - Sun Oct 30 2005 06:19 PM Re: 302 GMC six  
tclederman  Offline
Joined: Sep 2001
Posts: 24,922
Jarvisburg, NC
Tony,

In general, most of the parts are different. GMC parts seem to be a little higher-priced and a little harder to find than the same parts for a Chevy truck engine.

The GMC 302 is an excellent engine that is more easily adapted into GMC trucks than into Chevrolet trucks (the GMC engines are a little longer than 216/235/261 Chevrolet engines.

Maybe others will state an opinion on the value of an unknown-condition 302 (or, any used 40-50 year old engine). Shipping cost is also a consideration when setting a value of an engine (from a buyer's perspective).

Here is a Convert to a 302 Tech Tip found elsewhere in this forum.

Tim


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#51691 - Sun Oct 30 2005 10:13 PM Re: 302 GMC six  
OldSub  Offline
Cruising in the Passing Lane
Joined: Oct 2003
Posts: 6,663
Seattle, Washington
GMC motors are similar to the Chevy motors, but very few parts interchange. The distributor is an example of what will swap. Intake and exhaust manifolds do not swap.

As Tim says hop up parts for GMC motors are not as common and generally cost more.

I have a GMC 270, which is externally the same as a civilian 302 and like the power the motor makes. I'd love to replace it with a 302.


Its true, I really don't do anything but browse the Internet looking for trouble...
Steve@OldSub.com . www.OldSub.com . www.MaxwellGarage.com . www.OldGasTowRigs.com
'55 1st GMC Suburban . '54 GMC 250 trailer puller project. '54 GMC 250 Hydra-Matic . '54 Chevy 3100 . '47 Chevy COE . and more...

#51692 - Mon Oct 31 2005 02:24 AM Re: 302 GMC six  
ttodd  Offline
Shop Shark
Joined: Feb 2005
Posts: 561
Mo. Ozarks
I should have a reply for the amount of engines .
There should be around fifteen or twenty of them.


#51693 - Mon Oct 31 2005 03:21 AM Re: 302 GMC six  
oldchevy46  Offline
Shop Shark
Joined: Dec 2001
Posts: 839
Moscow, ID. USA
I would not give more than $200 for a unknown engine unless I knew for shure there was no cracked head or block,
But if there was any info about past history of moter I would be pretty intresed
keep us updated on what you find out
I could take 2 at least:-)


Luke Dahlin

1946 Chevy 2 ton
1966 Chevy 2 ton
1969 Chevy 3/4 ton 4wd
http://www.stovebolt.com/gallery/dahlin_luke_1969.html]1969 Chevy 3/4 ton 4x4

#51694 - Mon Oct 31 2005 01:10 PM Re: 302 GMC six  
Tony  Offline
Extreme Gabster
Joined: Jan 2000
Posts: 6,258
Where men are men and trucks a...
Military 302's have no provision for a mechanical fuel pump,use an electric pump instead.That,a few un needed lumps on the engine casting,a different front pulley is the primary differences.
A stock 302 rebuild costs about same for a Chevy 261 for example,it all depends on how much work you do yourself and if you're lucky at scrounging parts.


#51695 - Mon Oct 31 2005 09:44 PM Re: 302 GMC six  
GMCpanel  Offline
Shop Shark
Joined: Apr 2002
Posts: 2,664
Springfield, MO
15-20 302s??? Are these in Missouri?


Get a REAL truck, get a GMC! www.oldgmctrucks.com
1954 GMC De Luxe COE

#51696 - Tue Nov 01 2005 02:27 AM Re: 302 GMC six  
Fred T  Offline
Master Gabster
Joined: Jun 2000
Posts: 5,174
Wichita, KS
They're worthless. I'll come get them if you'll buy my gas so you can get rid of them. wink Sounds like enough that I will have to make two trips. grin

Let us know when you get them. Some of us would give our first born for one.


Fred
52 3600
69 C-10

#51697 - Wed Nov 02 2005 12:13 AM Re: 302 GMC six  
bobadame  Offline
Junior Member
Joined: Oct 2005
Posts: 8
Fort Collins Co.
I'd give $500 each for two good engines.


x x

#51698 - Wed Nov 02 2005 01:36 AM Re: 302 GMC six  
reo_guy  Offline
Member
Joined: Aug 2000
Posts: 416
southeast SD
Stock, the DUKW would have had a 270. The DUKW is worth a lot of money, please don't part it out if it is salvageable.


Jason

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