what alternator is interchangble off the 1jz? supra? need to know so i wont buy the wrong thing. thanks

 

Factory 2jzge right of your SC300 will do the trick(2jzgte possibly also)

 

They are all the same.......

 

do the plugs match? I know for a fact that the TT alternator plug and the SC plugs do not match.
as far as parts goes they are the same but built for different outputs. The auto alternators put out i think it was 10 amps more than the manual ones.