So I run across this old guys truck (502 GM crate motor)

[meatwagon83]

Originally Posted by Firebirdjones

Yeah, except I ran into a little hitch with my gen 6 502 last year. Bought it new from Scoggin/Dickey.

Although the mechanical fuel pump boss is there and I had mounted a fuel pump with it's pushrod. It still wouldn't run the pump. On the dyno we used an electric pump so I didn't find this out until the engine was installed in the truck,,,,UGH!!!

Once I realized the pump wasn't working I called Scoggin/Dickey to get the scoop. Found one of two things that could be going on.

Either the roller cam GM installed doesn't have the accentric to run the pump pushrod,,,,or the block wasn't drilled completely through for the pushrod to reach the accentric on the camshaft. Either way the engine would have had to come back out to fix the issue, it was under warranty of course. At this point I removed the pump, left the pushrod in and stuck my finger in there holding the pushrod against what should have been the camshaft accentric while my wife cranked over the engine. I felt absolutely nothing on my fingertip, not even a vibration or any type of movement. Even if the camshaft didn't have the accentric I believe I should have still felt the pushrod rubbing on the camshaft. So I came to the conclusion that the pushrod hole simply isn't drilled completely through the block to reach the camshaft accentric.

I decided at that point (since it was full of fluids and ready to fire off) to just run an electric pump on the truck and forget it for now.

So buyer be warned

my guess would be the cam didnt have the eccentric on it