I have a bad drivers rear caliper (piston sticking a bit). I'm going to replace before this season kicks off, and I'm trying to sort out (without being at home to check) if the spare rear passenger caliper I have would work if I switch the bleeder with the banjo bolt? Same thread sizes?

Parking brake might be an issue? I can't picture any other differences

 

I think not.

 

I dont think it would end well, even if you got everything to fit.

 

I wouldn't try it my friend. As cheap as they are I wouldn't risk the safety of my passengers.