now if the 400 was really a big block. old Pontiac's engines are all the same block really.

change the rear end too to a 12 bolts with 3.73 or 3.90 gears. and get a posi rear.

my 70 formula 400 had a 400, th400 and 373 gears, 12 bolt. that car hauled.


with the combo you listed that will be a fun car. make sure the back sub frames not rotted out.