I NEED A LITTLE ASSISTANCE IN INSTALLING A 1970'S 400/455 PONTIAC MOTOR AND MUNCIE 4 SPEED IN A 1987 PONTIAC TRANS AM. THE CAR NOW HAS AS YOU KNOW A CHEVY MOUSE MOTOR (305) W/5 SPEED TRANS. NEED TO KNOW,#1 WILL IT FIT WITHOUT CUTTING. #2 HEADERS FROM WHAT? #3 IS THERE A KIT FOR THIS? #4 WILL THE HYDROLIC CLUTCH WORK WITH THE MUNCIE?
Welcome aboard, I'll try ...It has been done years ago, by Butler Performance on a race car, a '91 Firebird. Without cutting, I think no. The distributor is going to interfere with the cowl.Tube headers, I also think no and doubt any are being manufactured for that swap. Cast manifolds or custom headers would be your options. If you're street-bound, good dual exhaust with tailpipes is also gonna be difficult. I doubt that a kit exists. You will have to fabricate mounts.The stock clutch slave could possibly be plumbed to a hydraulic throwout bearing, but the aftermarket slave cylinder might be required instead.Not sure if you can draw thru the stock fuel pump with a mechanical one but I bet one will fit. A "pickup only" rig that goes in place of the pump might be available or one could be fabbed.You'd have to want it pretty bad, fourth gens don't get much love. If you're goin racing, whack it all at the firewall and fab up a tube front end on an older or aftermarket subframe maybe?
try looking up greg murano of rochester n.y. 10 sec. 83 firbird 455 with headman headers #35140 with rerouted #7 tube(70 firebird)and you will need to narrow the cross member.or don kennedy in ca. both cars have stock hoods! they are in the pontiac musclecar performance book by Pete McCarthy.
76 455/4spd TRANS AM69 GRAND PRIX 455/5SPD