Hey guys. I got a 76 chevy C20 pickup with a 1990 305 motor in it. It is no longer has the tbi as I have put a Edelbrock intake and 600 cfm carb on it. The truck runs like a raped ape and has tons of power but I found I have a front and rear crank seal leak.What I would like to know is are the crank seals for a 350 the same as the ones for the 305? The dipsh** at autozone says they are but I dont think they are. What do you guys think?