Idler arm problem? Please help

These aftermarket pitmans and idlers don't seem to have the same dimensions or tolerances as factory.

IIRC, 383 cars originally got a special 383 only pitman. And I think it was lower. May effect the other side.

Also 383 4 speed cars usually have lived a rough life. Motor changes, fender wall headers, all kinds of people messing with them.

The 383 parts are hard/expensive to come by. Restorers/owners sometimes do whatever to make the parts they have or can afford to fit. I see lots of hacked/repaired 383 K-members for sale. They sell and end eventually end up on someone's car.