1954 GMC Rebuild In Progress 09/13/2024

Just started a new build project on a 1954 GMC.
248 CID Inline 6

NOTE: Please don't provide opinions on the 248 engine vs swap. I don't want to swap it

For some fun... seller told me the engine "would start right up" and the only thing keeping it from running was the wiring harness... Now that I know better I should have connected the battery and tried staring it using the starter "push button". Oh well... live and learn.

After trying to start it no compression on most cylinders. Just had the machine shop break it down and found multiple bent pushrods. Two small cracks in the head, worn CAM and lifters, cracked radiator. Whew!

looking for a CAM is the issue. All other parts seem easy to find. Cracked head was minor and repairable. Rebuild in progress. Cutting the head down 60/1000 and the block 20/1000. Looking for a street cam but not a big deal. Probably have the stock cam reground.

Moving to a better intake with 2 barrel and better exhaust headers. That's it for engine mods. Expect about 8.9 compression ratio and around 170 lb/ft torque. Taking extra loads off the engine like fan and fuel pump. Should run nicely.

Anyone have a camshaft or know what the part number is?

 

Welcome to the HAMB from Illinois.

 

Thank you! I used to live in Hindsdale, IL but now I'm in Houston.

 

Looking more and more like I am going to have to send the cam and lifters out for re grind!

 

I'd start a new thread here:
https://www.jalopyjournal.com/forum/forums/the-hokey-ass-message-board.5/

Title the thread something like:

"Need camshaft for GMC inline 6. Suggestions?"

Then tell about your engine build, like above and include the photos.

This will get your issue more views and feedback.

 

Found a bunch of old docs

 

Gracias Phil!

 

Welcome, you might try Clifford Research, 6=8,. They may be able to help with your six. I raced six cylinder chevyII back in the mid 70’s. I bought parts from them back then.

 

Excellent suggestion. I am already in contact with them! They helped me specifically on exhaust and dual carb setup.

UPDATE - My transmission has no rear and main part. It is one case for the entire setup! We are installing a Hurst shifter and fabricating the braces.

 

So we found a cam and lifters at Egge and they were able to do a 3/4 grind on the cam. Engine should be ready for the truck in Nov 24.