oil pan/timing cover balancer flywheel

[oldgold]

picked up fresh bore short block 350 1 piece rear main block. if oil pan/ from all 1 piece blocks are the same? balancer/timing cover different from 2 piece and flywheel. i found a flywheel from 90 350 but it has a weight that is like 2 forks end to end and a balancer that is thin like the old 305s can you help me.oldgold

[bushracing67]

the one piece 350 is internal balance balancer, with an external balance flexplate, so yes the flexplate should have a weight on it, i believe timing cover is the same, oil pan is different

[oldgold]

the one piece 350 is internal balance balancer, with an external balance flexplate, so yes the flexplate should have a weight on it, i believe timing cover is the same, oil pan is different

how would i know if i had the right balancer even though the back is thin.

[bushracing67]

if the shape of the balancer is uniform all the way around it should be good, the external balance balancers have obvious weight on one side