LAST POST INCORRECT
CORRECTION:
RECENTLY CHANGED ENGINE CRADLE ON 1984 PONTIAC FIERO 2.5L
AND ALIGHNED
MOTOR AND TRANSMISSION MOUNTS AND BRAKES OK
CAR PULLS TO RIGHT UNDER ACCELLERATION AND TO THE LEFT WHEN DECELLERATING WITHOUT TOUCHING BRAKE. HELP

I would look at these 2 things:
worn cradle bushings - which makes the whole cradle shift when accel/decel
worn A-arm bushings - which makes just the a-arm shift when accel/decel

also, bad struts could cause a little bit of that effect, but the most likely thing is the a-arm bushings (bitch to replace) and the cradle bushings (not as bad, but still a bitch)

:smoka:

Check you tie rods and tie rod ends as well. definatly something twisting in the front of the car. Could it be the Frame??? Every thing on a Pontiac Fiero is a bitch to fix or replace.