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grcorey
Guest
I have a cracked flywheel on a 401 out of a '65-1/2 skylark gran sport conv. I haven't been able to find a replacement but have found a flywheel from a '70 - 455 that will fit all but for the bolt holes. When I align the weights the bolt hole on the 401 align with the spaces between the bolt holes on the 455. Can I drill the 455 Flywheel to align with the bolt holes on the 401, or will the drilling throw off the weight and balance?