I'll add some notes - just in case. I use a local guy - Michael at Freak Show Performance - so I'm lucky to have a pro converter house close by. He built a converter for the dragster, using the standard setup for a PG converter with an adapter bell to fit a Ford. Not uncommon, lots of the 275 tire types do things like that. We ended up being about .065 too long in the converter once all the pieces to be used were set up and measured. Full setback in the trans + .125 pull out was that much less than the depth from the back of the motor plate to the flex plate bolt face, including the required .250 spacers for the converter to clear. He cut the converter apart and machined a few surfaces and I got back the space I needed. Side note - he also would not let me pay him for the work. Crazy. I also had to take a little off the pilot adapter because of how the motor plate and flex spacer positioned the flex plate away from the end of the crank. Needed a little step - not something you're likely to encounter, but if an adapter bushing is needed, note carefully how it seats in the crank.
All that to say - be sure you do several careful measurements using all the pieces you intend to run and a final mock up before fully committing to the final install.
The adapting a PG to the Ford block ended up being right at $1000.