I have 2 bellhousings, which is the correct for a 70 Buick 455/4 speed? Cast number 9774035 or 97?5581 Also stamped numbers on trans appear to be, cc1 40721 ? Thanks for help. Tom
Group 0.683 --Upper Flywheel Housing Cast number 9774035 = 225, 300, 340 cid 1964-67 Cast Number 9785581= All except 250 cid 1968-72( which includes 350,400 and 455 cid engines but I am unaware if there was ever a 430 cid manual trans car, including a 4 speed car. I did meet a guy at the TRR last year that claimed to have purchaased new a special order 430 cid powered 67 GS. )