i got an l98 89 corvette engine, that i put into my 85 firebird, 600cfm eldebrock street carb,zz4 cam,1.5 rockers,headmen shorties, custom y pipe into 2.5 high flow cat (i think its definitly not stock because it is very small compaired to stock ones) with all the stock piping into a 80 series flow, now my car before had a 305 in it that was computer controlled carb, this new carb isn't at all for those who know what carb i have, i am also using the same 305 distributor, the car doesn't have much low end power (which these L98s are torque beats so im confused especially with my mods)once it gets past 3k it then screems but still isn't performing how it should, as for tuning the car, i did EOIC method for the valves, compression was tested all before and has great compression on all cylinders, im not sure if the old distrubutor isn't punching enough punch into the engine or timing it right, maby the computer isn't right since it was a 305 before im stumped . this was my first car project but i did it with my dad that has been building chevys for over 40 years, so maby theres something we missed, when you get a cam headers, everyone says you need a good tune maby thats what i need im not sure, what does a tune involve on my car.so whats your guys take on this thanks.

 

you said that you are using the dizzy from the 305, which was computer controlled. You need a non computer controlled distributor.

 

If that dizzy is the stock one out of the 85, you might want to replace the cam gear, otherwise you will knife edge the hell out of your new cam.

 

An '85 distributor cam gear and a ZZ4 cam are completely compatible with each other.

 

Yeah that stock dizzy is what is throwing you for a loop. Just get a used one and buy new high perf parts to rebuilt it with and you will have no problems, or use an MSD or similar igntion box with a remote coil and you will have nothing to worry about, thats what I am using!