I've got a 96 T-Bird 3.8L. I'm getting the engine rebuilt and I asked if the shop in St.Louis,MO would put a supercharger or V8 in instead of another 3.8L. They said they wouldn't do it. I'm now trying to find what else I could do to get some more HP out of the 3.8L. Any suggestions? Anyone know about how much the mods would cost? Also, my check engine light just started to flash off and on. Along with that, the engine and the entire car are shaking pretty bad. When I go to accelerate, the car kind of hesitates. Any ideas on what could be causing it? Thanks for any replies.