OK I got a 85 buick regal with a 3.8l V6. I have rebuilt the engine with 9.5 comp. ratio changed it to 4 barrel a cam and hedders.It sound pretty mean but I can not do a burn out.Today I changed my rear end from a 2.73 to a 3.42. I help alot but still the tires grip. What else do I need to do!!!I spent alot of $$$ already.By the way I have a th200 tranny.Can't anyone help?!!