Need 4-speed Help

First the good news... Received my new McLeod pressure plate from Brewers last week. Got everything torn down, reassembled, and went to test.

Now the bad news... Still have the original problem! There's good linkage adjustment with play when clutch is fully released, but with the car on jack stands, shift trans into 4th gears, release clutch, and rear wheels turn. Put on e-brake, engine RPMs drop, rev engine, and the squealing noise (Somewhat high pitched and tinny sounding). So, have now ruled out a bad pressure plate, but not sure what else to try.

Beginning to suspect the tranny again. I've just come fully circle...
I apologize if I missed this or not, I just skimmed through this thread - did you look further into the possibility of some binding at the crank? Was the crank originally drilled for a manual tranny? I think I read that you installed the roller-type pilot bearing, but don;t you sometimes have to trim the end of the input shaft for clearance issues? Maybe the end of the shaft is making contact with the crank and that's the squeaking and binding you are experiencing.

I think that issue would display all the symptoms you are describing.