I am selling my 92RS 305TBI and buying a 91 Z28 350TPI completly stock. I have about 2500 for upgrades after I buy it.
How should I spend my money?? I will drive her to work dailly on the interstate 100 miles round trip and she will see some track time on weekends. I do not know much about TPI so I need some advice. I have 373's in my 92RS and its fine on the interstate. I have friends that are pretty handy with wrenches and are willing to help me so I can save on install prices. And yes I am sick of the 305 so 350 here I come

 

You should probably start with the exhaust. Some good gains to be made there and it'll help other mods that you do. Might also want to look into prom burning. You can tweak some stuff to help with gas on the highway. With the rest of the money you could do heads, cam, and intake if you manage it right. Just spend the time to figure out what you want to do with the car performance wise and what parts will get you there.

 

aww poor 91 Z28....so many miles man

did u check the floor pans for rust? 80% of 90-92 Z's have floorpan rust

 

Torque Converter and shift kit ($500)
Shocks and Struts ($500)
1LE or better front brakes ($800)
Headers and catback ($800)

Then, before you buy any real engine parts:
Moates Autoprom with gizmos ($340)
Innovate Motorsports LM1 wideband ($350)