GMC 228 exchange for 292

[Sixty7292]

I currently have a 1947 GMC 1/2 ton pickup with a 228 engine in it, (the engine is not going) the question is, can I bolt up a 292 to the gearbox and make up some engine mounts?

[Warrens69GMC]

I believe the bellhousing is different. I also think it would be best than to rely on a 64 year old transmission

Grab a NV3500 (5 speed) and a non-torque tube rearend 8.5" (a 3.42 or 3.73) from a s10 Blazer 4X4 (92-up) works well.

[Sixty7292]

I understand what you are saying.
I have a 1967 donor with all the running gear / motor 292 the original gearbox and I have a comaro diff.
Do you know what gearboxes came in the C10 1967 1/2 ton pickup it is a stock 292 and it is 4 speed box?
How do I tell the difference between the Sagnaw or a Muncie?
Would the box in the donor 67 be a good option to put in the 1947 GMC pickup?
I would really like to be able to pickup one of the gearboxes you are describing, but they are just not off the shelf here, being in Australia has its disadvantages.

[Sixty7292]

As they say I have let my fingers do the walking, research has proved to me that I have an SM465 box.
So in your opinion if I run the following I would have a pretty good set up.
Engine -1967/292
Gearbox - SM465
Diff - Comaro - It is a drum brake 3.08 or 3.31 or it is close to this ratio.

[dwcsr]

The weak point will be the camaro rear. I would try for a truck 12 bolt rear if you can. The 292 with a granny gear will rip open a camaro axle.

[mknittle]

Originally Posted by Warrens69GMC

I believe the bellhousing is different. I also think it would be best than to rely on a 64 year old transmission

Grab a NV3500 (5 speed) and a non-torque tube rearend 8.5" (a 3.42 or 3.73) from a s10 Blazer 4X4 (92-up) works well.

we use those year 64 old transmissions in our jeeps on rocks and everywere else with no problems. So swap it for an over drive if you want that but I wouldnt worry about it s age.

[mknittle]

Originally Posted by Sixty7292

I understand what you are saying.
I have a 1967 donor with all the running gear / motor 292 the original gearbox and I have a comaro diff.
Do you know what gearboxes came in the C10 1967 1/2 ton pickup it is a stock 292 and it is 4 speed box?
How do I tell the difference between the Sagnaw or a Muncie?
Would the box in the donor 67 be a good option to put in the 1947 GMC pickup?
I would really like to be able to pickup one of the gearboxes you are describing, but they are just not off the shelf here, being in Australia has its disadvantages.

the 4 speed is a sm420 muncie.they were used in trucks and busses from 1/2 to 2 ton from 1947through 1967 they are popular for jeeps trucks didn't use Saginaw only cars

[mknittle]

Originally Posted by dwcsr

The weak point will be the camaro rear. I would try for a truck 12 bolt rear if you can. The 292 with a granny gear will rip open a camaro axle.

Isnt the 12 bolt too wide for the AD truck?

[dwcsr]

You can narrow them.

[Sixty7292]

Originally Posted by mknittle

Isnt the 12 bolt too wide for the AD truck?

AD truck, excuse my ignorance but what does this mean? is it the model?
Question, if I run the original diff from the 47 its probably going to be to lower ratio, I have the original diff in the 67 C10, that would mean I would exchange the complete running gear from the 67 C10 into the (AD) truck.
Is a standard 67 C10 diff the correct width to fit in the (AD) truck?

[mknittle]

Originally Posted by dwcsr

You can narrow them.

Yeah, but if I were going to put that much effort into I would do a 9" f#@d. The 12bolt isn't that much stronger than a 8.5" 10 bolt.

[mknittle]

Originally Posted by Sixty7292

AD truck, excuse my ignorance but what does this mean? is it the model?
Question, if I run the original diff from the 47 its probably going to be to lower ratio, I have the original diff in the 67 C10, that would mean I would exchange the complete running gear from the 67 C10 into the (AD) truck.
Is a standard 67 C10 diff the correct width to fit in the (AD) truck?

Advanced design 1947-54 go to http://www.stovebolt.com/ lots of info