Hey guys,

Helped a friend pull the 305 out of his silverado, and drop in a '71 402 we pulled out of a '73 truck. It was almost a bolt-in swap except for the d-shaft.

The 402 runs cool, has good oil pressure & doesn't smoke, but it has 50 PSI of compression on the #2 cylinder. We checked compression on #6 and it had 125 PSI.

Would this be valvetrain related? The only other thing I could think to mention is for some reason, the fuel pump pushrod isn't moving. So we used an electric fuel pump.

What do we need to look at?

thanks
chip

Preaching the Hot Rod Gospel according to the 4-stroke apostles:

Suck, Squish, Fire and Fumes