What To Do With a Tweaked Flex Plate?

ATP Z196 will fit it. Heck I used one of these to mate a 1992 42RH OD trans out of a 92 dakota V6 pickup to a 1974 318. The crank bolt pattern, and torque converter bolt pattern were the same.

I believe a 727 has a different torque converter pattern, all small block and big block have the same 6 bolt crank pattern. I think the only exception to that is the Hemi which used an 8 bolt crank pattern.