does anyone know the difference in pitman arms??

So I was wrong, I can admit that and did. I checked all the usual sources, did a search here, checked part numbers, etc. I don’t have a Moog book. When autoXcuda posted the discontinued info I kept searching and found that Firm Feel actually has them and posted the link.

They’re all discontinued, Firm Feel seems to be the only source, and I’ve never seen it mentioned by anyone doing a big block swap here before. So pile on if you want, but you didn’t know where to get one either.

I don't sense negativity. Just expanding on the differences.

That all said, I think there are plenty of people running the non 383 pitmans on 383 cars.