'70 Dart 392 Project; what direction?

TTI‘s website say the starter you bought for the 2005 Ram, and also 61R274 at Bouchillion Performance. But they both look to expect a hole in bellhousing at the top spot rather than a stud/threaded hole. There was also a RobbMc Performance 3005 for 11” flywheels that looks to work, but no idea which

Maybe there are bellhousing that didn’t have a stud on the top? Mine does, so no sure.

Worst case, you could drill the threads out on either the bellhousing or starter.