440/833 in '73 Dart...starter very unhappy

Hey guys....

My brother is wrapping up a 44 swap into his '73 Dart Sport.

Needless to say it took longer and cost more(to do it right) than he ever envisioned, but it's nearly finished now.

The problem we've encountered is that the starter sounds HORRIBLE. It appears to be binding, and it takes a good battery and jump box to get it to turn the engine over fast enough to fire off. It also shrieks on overrun, as the engine starts to catch and run.

This is an old-style large frame starter that was working fine on the 318 that was removed prior.

The clutch is a Mcleod 10.5", and bellhousing is for this application, both sold by Brewer Performance.

Any help greatly appreciated.