Correct - GMC motor into 1949 or 1950 GMC 1/2 ton. I am swapping out the 228 and will be replacing with the 270.

Originally Posted by EdPruss
I presume you have a GMC truck for the GMC engine.

I got a new front pulley/harmonic damper for my 302, same as 270, from a 292 Chevy engine, same shaft, keyway dims; 2 groove pulley, 3/8 belt. I have heard of 3 groove pulleys, but didn't need that. Machined a little off the end so it would line up w/ 302 water pump, alternator. I couldn't find another modern harmonic damper.

Be the person you would want as a friend because at the end of the game the King and Pawn go in the same box.