Timing pointers

Hey guys, has anyone measured the distance between the TDC points from the pre-69 (pass side marker) to the 70 and later (drivers side marker) on the balancer. I am using the early style cover and water pump with the bolt on tab, but using a balancer for a later engine, I measured and marked the balancer 5 years ago when I built the engine, want to double check it but no longer have the later balancer and cover to check against.