Originally Posted by Cab_Burge
I think you have to run the later center main on all the later blocks due to the way Mopar machine that center main in the block and in the cap, I don't think you can run an early center main bearing in a 1973/1974 440 and later block, maybe so confused


Cab, the small thrust main will fit in a large thrust main crank line .


running up my post count some more .