I just finished putting a set of rebuilt ported and polished E7TE heads, F303 cam, a ported and polished cobra intake, and a 70mm throttle body on my 1991 Mustang GT. It took some playing with the timing to get it to run but its gotta idle around 1500 to be driveable, and its very slow it barely takes off. Anybody got any ideas of what could be wrong? Thanks in advance for any help.