front of engine set up for 1969

so a few pieces of info to clarify:
forged to cast change happened mid year in 1972 so you might have a forged engine depending on when the engine was built as opposed to when the car was assembled.

You have to match the timing cover, the harmonic balancer, both 69 and down or 70 and up. They will bolt in place but timing mark will not match the scale in the timing cover. The drivers side lower radiator hose and power steering pump for 69 will cover up the timing marks on a 70 and up timing cover and of course the water pump and radiator have to be matched for drivers or passenger side. So the only reasonable way to approach this is to have the timing cover, harmonic balancer, water pump and radiator (and the power steering pump and brackets if you have PS) be either 70 and up or 69 and down. There are also differences in the pulleys so add that to the list. The A-body year and motor year make no difference as long as everything from the front of the block is matched.

The nightmare I am facing is a non-original engine that has been in a car buried in a shop for 20 years. We know it has a 69 and down water pump and radiator and a 70 and up timing cover, now trying to figure out which balancer it has to figure out how to get a matched 69 and down set up that is complete.