ok so i found this site to purchase a new transmission. i have a 1986 iroc with a 305 tpi pretty stock just gotta aftermarket exhaust with a high flow cat as far as i can tell. so which ones the right trans heres the site page they got mild heavy duty and super sport http://racetransmissions.com/store/i.../cPath/1_25_56

 

If the trans is already out, you could take it to a shop and have it built for around 600~800 dollars.... Are you located in Florida???

 

no im in michigan and still driving it just doin some research how much does it usually cost to have somebody rebuild the one i have i know the rebuild kit is like 300 bucks. right now when i stomp on the gas it shifts at very high rpm and once in a great awhile i feel a small slip if i drive normal it seems fine

 

If the transmission is good shape, I would add the TransGo Performance Shift kit or Heavy Duty Shift kit with the boost valves and Corvette servo. Is the fluid still in good shape?