Originally Posted by kewpie79
I profess to know very little about engine building. With that out of the way, the engine going into my 84 GP, which is going to be a cruiser, not a racer. It has the following:
305 block from Z28
Swirl port heads from a 93 pickup
bored 40 over (not sure if that is the correct terminology)
Lunati barebones cam and lifters
Any problems with this? Also what kind of power will it generate?
(stock rear end and tranny by the way)
The heads have nominal 64cc chambers- way big for making decent compression w/a 305 or 334.
BTW, a 334 is a 3-3/4" crank in a 305 (0.030" over, I believe). The idea of stroking a 305 is not a particularly good plan, when 4" bore hydraulic roller capable blocks/short blocks/Vortec L31 long blocks are so easily and cheaply available.
If it was me, I'd take the guts out of the 305, get a different set of pistons and install it all back in a 4" bore block. If you want to reuse the cam (keep the lifters on the same lobes they were on in the 305), you can use any block (327 or 350, except the Gen 2 LT1/4 engines) but I'd recommend a hydraulic roller block so if in the future you wanted to upgrade to a roller, you could do so easily.
The stock differential is weak, you will need to upgrade if you make any real power and have traction.
You might want to read up
on the subject.