this horse has been beat to death , but------

famous bob said
The engine came out of as 66 Chrysler still mated to the trans, it had a rear main leak when I tore it down, which I didnt pay much attention to because I was not going to use anything but the block. Anyway, I have found that the cast rear maim seal cap is .061 shifted to the pass side , . Waiting on new one --------

May have missed it, but aside from the cast rear main seal cap shift issue, is your install past/planned also including the seal position rotation offsetting in relation to the seal retainer/block flange mounting area?