Transmission help....

Ok, in my car is an LS A1 trans… i guy here in town just offered me another trans for $50, i went to look at it and the tag said S1. Im wondering how to tell the difference between a b16 S1 and the LS S1…? I have a J1 B16 in my basement but it needs rebuilt, and it needs a lot of money dumped into it… Any help would be great, thanks.

Dallas

http://forums.g2ic.com/showthread.php?182526-91-A1-Transmission