Can the gears out of a automatic n/a fit into the TII rear end? I want the 390 gears to replace the 410 gears in my TII rear end.

 

No...N/A used a 7" ring gear set, while the turbo uses a 8". You *could* replace the turbo 2 rear end and half-shafts with the N/A rear end and 1/2 shafts. but it would require a custom driveshaft...and most likely would not handle the power of a modified turbo 2, provided traction.

 

Or you could just try and find the R&P from an Aussie or Japanese Auto.