[fastfredracing]

I don't believe any of those cars came with a 4 bolt block. I owned two factory 4 spd, z28 cars , and neither of them had 4 bolts, they all had front disc brakes, I don't remember ever seeing any with rear discs, but the brakes from a later firebird/camaro would be an easy swap if you are using a 10 bolt rear.
The 4 spd cars were always hard to come by , even when the cars were plentiful, The hardest part of the 4 spd swap for me was always finding a set of pedals. As far as tranny's go, I always had better luck with the super t 10's . I broke all of my muncies( never had an m22 though).
I wonder if vortec heads are allowed. My local engine guy loves them , and says they make more power than a lot of the aftermarket heads. I know they are building 400 hp motors all the time with them. . I sold off all of my stuff years ago, or I could have really helped you out. I had pedals, linkages, bell housings, shifters, motor cores, transmissions, several different rearends, with different ratios. I was really into this stuff before the porsche bug bit me. You can also get factory alum intakes if you are going to run a q jet. the 83, and up4bbl cars had them.
Sounds like a cool project, I mostly just saturday night street raced, and goofed around when I was into this stuff, but I always wanted to build a track stomper/auto cross car out of one of these.
I recently got to drive a car I built when I was about 21/22. I sold it off to a cute young girl, but when she went away to college, her dad took care of the car, still in pretty good shape. This one was a quickie cheap build from spare parts I had at the time.1980, Little 305 with around 10:1, mild cam, good factory heads, headers,later alum intake , q jet, duals, and 3:73 rears, mild stall convertor, and a wicked shifting th 350 ( I worked in a trans shop back then) car actually still runs pretty good 20 years later.
Man, I back then, I could build a pretty hot little motor for $1000.00-$1500.00 depending on what parts I had at the time. I can barely even buy a clutch for my 930 for that kind of money now. I sort of miss those days.