I bought a 1978 Caprice coupe with a friend to get back into drag racing on a budget. I chose this car because from the time they came out in 1977, I always thought they were pretty cool and always wanted one. It has a 350 with a turbo 350, and had a 2.41 gear in a 7.5" 10 bolt diff. I found a complete 3.73 posi 8.5 for it for $250, but one of my friends blew his diff and needed it more, so I sold it to him. I couldn't find a deal like that again, so I bought a 7.5 posi carrier with a 4.11 gear set for $200 and put it in. Works great, even quiet, but how easy will it be for me to blow it up?
Engine is completely stock now but has a very strange power curve like it has a cam in it. Doesn't start pulling until 2500 and then pulls really hard, so I changed the carb with my freinds Qjet from his Malibu, and no change. Have to date run a best of 15.9 at 87 mph. Not bad considering it still has a y pipe. I want to put my carb/intake/cam/header setup from my old race car, so the power curve isn't going to get any lower. To remedy this I want to put a 3000 stahl converter (I have kicking around) so it will launch. I run slicks at the track. So again, here's the question, will that 7.5 hold up to the setup I just described in a 3800 lb Caprice? What have your experiences been?