Thanks, great info. The heads and block have E6SE numbers stamped on them.I did some research and found that it is 1986 model year and that those heads really suck along with true flat top pistons that went with them. Also from reading articles, I can't run any type of cam either. I have the option of getting a mark VII complete 5.0 engine for $400, should I do that instead of messing with this miss-matched engine? Also the my car has AOD and the ECM is for manual car, is that a big problem?