So my uncles wife is one of the managers for langdale Chevrolet in town, and she gets like a 35% discount on engines and parts..... My 305 is to be honest, a super leaky (1 quart every 60 miles), super worn out (300xxx) miles, wimpy, smokey embarrassment that's hidden by polished aluminum and a small cam...

I'm looking at 350 crate motors and I'm looking at a ZZ4 HO and I've come to have a dislike for edelbrock carbs. Any tips or pointers on engines and carbs, also want to get a slightly more aggressive cam but don't really understand the duration and lift and so on. Basically I can tear an engine apart and put it back together and change the roller rockers and I kinda understand heads. So I'm asking for a point in the right direction haha.

It'll be going in my 85 iroc-z because as it sits right now, my fiancé refuses to ride with me and my friends laugh their asses off at me.

What I have right now is Hooker short tubes going into a custom y-pipe going to a knockoff thrush single inlet duel outlet muffler, no cat, edelbrock performer intake, edelbrock 500 cfm carb, comp roller rockers and lifters,
Holley 14 inch open element air intake, hooked to a 700r4 tranny with a shift kit and a 3200rpm stall converter.

 

What happened to the original computer q-jet that came with the car? It's a perfect match for the ZZ4 crate engine.

 

when i got it the car had an 88 firebird 305 with a worn out 650 cfm edelbrock. absolutely NO ECU. completely bypassed. distributor is hooked to battery somehow.

 

ZZ4 crate, 650 Holley double pumper (no Edelbrock or vacuum secondaries, please) with a TV cable geometry correcter bracket.

The intake and distributor that come with the ZZ4 will be fine. The intake is basically a GM-branded Performer (a Performer RPM would be a justifiable upgrade). The factory power and tach wires should hook up to the distributor.

Headers need to be 1-5/8" primaries minimum. Down pipes 2-1/2", everything after the Y at least 3". Not sure what muffler you have, but I've had excellent results with 3" single in/out Magnaflow and Flowmaster mufflers.

The stall of the converter you have is a little high, but at least won't hold the engine back.

If you look at the history of my Berlinetta #1 in my vBGarage, you'll see I basically had a ZZ4 clone with the factory q-jet. I did run a double pumper spread bore for awhile, but the q-jet was fine. A 650 Holley like I suggested will do fine, though.

Hope you have some means of locking up the torque converter clutch.

 

uhhh, the stall converter im not sure on. it came with the car but hasnt messed up withing the 5000 miles ive put on it? i understand 4x4 and axles and transfer cases more than this honestly. i was into 4x4 offroading (not mudding screw that) but like climbing and going up trails and stuff so the car area im learning on