This is an extremely rare truck. I have one myself with a slightly later Chev
235 engine (much better)
The V8 conversion gives problems with the steering in that the frame is too
narrow in the front for the ex manifold. In addition, you have the pedal
mounting problem. Not to mention that the fan is way too low for the radiator.
Brake parts are available from Robert O Motor parts in W. Newbury MA
508/555-1212 (info) They are the civilian ones. (tell them it is a 46 1.5 ton)
The driver's side needs a different hose in that these civy cylinders do not
have an angled (up) inlet connection. In addition, you can use one of the
rebuilding places like White Post Restorations.
The ratio is 6.66 to 1 and the over/repowering will probably give you rear axle
problems that were common to the Chev's of that era. The mil axles are 10
spline and different from the 16 spline civy and 13 spline 2 speed rear axle
shafts. In addition, the xfer may not like the increase in power. In addition,
the U-joints and drive shafts are smaller on the Chev than on the CCKW. With a
torque converter, I think you are headed for problems.
The GMC engine is about 1.5 inches longer than the chev. I am not too sure how
this would mount in front. The back is fine. My experience in mounting a chev
in a CCKW pointed this up all too clearly as it came up short on the timing
cover mount.
My personal suggestion: Sell this truck to someone who needs/wants this in the
original auger form. It is too valuable for anything else. If you get part way
thru the conversion and give up, or keep breaking rear axles and give up, it
will probably end up junked. Your mileage may vary.
Steve
The 'fleet'
1943 GMC CCKW LWB closed cab cargo w/M32 MG mount
1944 GMC CCKW LWB open cab F1 aircraft refueling tanker
1942 GMC CCKW LWB closed cab shop van (coming soon, have not picked it up yet)
1942 Chev 1.5t closed cab cargo
1944 Chev 1.5t open cab M6 Bomb truck
1945 Chev 1.5t clossed cab telephone (auger) truck
1944 Clark Airborne Bulldozer
1941 Buffalo Springfield steel 250 gal water buffalo
1945 Buffalo Springfield alu 250 gal water buffalo
1943 M6 Bomb trailer
1944 M6 Bomb trailer
1944 Ben Hur 1 ton cargo trailer
1978 M151A2 Jeep
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