I have an Engine D20E-6015-A6, I also, have a timming chain cover with water pump for a 68 engine. Will I have any problems fitting the 68 timming chain cover and water pump on the 72 Engine?

Pulley's should match as well?

Last quick question, What size Flex Plate goes to a 72? The crank has 4 bolts but I am not sure of the balancer size if its a 28oz or 50oz.

Thanks

 

It will fit and it is 28 oz. on the external balance.