Hi, I just purchased a 89 Rs. It has a new 350 in it (not sure the hp but hte guy i bought it from says its got close to 310hp) its got 3.73 posi, headers, and a 3in exhaust system (not sure what it is), new 180 thermo and a self installed fan. My question is its running on the 700r4 trans. Now when im in the car and i slam it it goes but my prolbem is the rpms dont even get close to the yellow or red its like holding back the torque u know. like i hit the gas and it only goes to about 3500 rpms and then shifts how can i get it to shift later at like 4200 or 4300. Also the headers are not covered and i was wondering what i could use to cover them. THanks Lots