This is kinda a dumb question just need some clarification. I know that both flywheel were used on small bolck but will ALL smallblocks accept both starters or are you limited to either 153 or 168??? I know that the bolt patterns are diffrent for the starters, guess what I'm trying to ask does it matter withc flywheel and starter I use, aslong as they match?? and are all blocks drilled for both patterns???