engine swap help
 

ok guys I just installed a 1991 t-bird 5.0 into my 1991 mustang. I am getting a strange idle with the mustang comp,(it sounds like I installed a mean cam). the timing is right on at 10 and everything seems to be working fine. But when the vehicle is in drive there is no power. It seems like I bought a 4 cyl. mustang, it bogs! I tryed to put the t-bird comp into it but the power does not change just the idle,(it gets smoother). what do you think it is I can not figure it out. ANY SUGGESTIONS WOULD HELP, thanx in advance.