Major Upgrades
 

I have a 93 z28 automatic, and was wondering wat bolt-ons i could purchase first to achieve a large boost in hrp and tq before moving up to the engine boring and overhaul main considerations are

Header systems
Intake manifold and throttle body
performance chip
stall converter and tranny
camshaft

thanks in advance

A basic cold air intake and catback exhaust will be the easiest mods to free up some power.

Best bang for the buck would most likely be what 2000GTP said, along with some headers if you don't have to do emissions then you can run the Long tube headers which gain you the most power.

Any intake for the most part will work. Don't HAVE to get the ~150$ K&N one.

Same with the exhaust, you don't have to buy a borla.

already have moroso cold air and magna flow catbak sys but there is a delay in throttle response that i dont like about 1-2 secs and it sounds like the engine wants to choke out and then my acceleration sucks

When was the last time your fuel filter was replaced? Fuel pump? Injectors? Because that is a fuel related problem.

Sounds like you have a mechanical fault with the car. Adding more mods isn't going to help that.

Well a tune up first would be the best thing to regain some of the power you've lost. Plugs, Wires, fuel filter, any fluids that need it. Then my suggestions for other mods would be gears(3.73), subframe connectors,Lca's and then pacesetter longtube headers.

Mikey