would a gsr tranny work with a b16 and also my buddy has some old SI head from his old engine and would that work with my b16 (just making sure)

 

yes and yes. but if its been sitting around why not just keep yours?

 

b+b=ok
d+d=ok

 

by old Si head, what do you mean? 92-95 Si head (D16Z6) will not work. 99-00 Si head (B16A2) will work. But if you have a B16 the head should be the same since a 99-00 Si motor is a B16. 02-07 Si heads (K20), also won't fit.

and Yes the GSR tranny (B18C1) will work. All b-series trannies are interchangeable.