flywheel housing shims? late production diamond block.

[mike657894]

When I took my motor apart there were no shims between the housing and block. I have seen them advertised. When Putting the motor back together I had heard about aligning the flywheel housing but I saw these large locator pins that made it so the fly wheel housing would not be able to move around on the bolts.




Were all fly wheel housings located by pins? Should I have some shims between the block and housing? Is there a general or regular amount of shims needed? If this is a problem can it be fixed with engine in car or do I need to pull it out?