I've got the 2nd gen 3s in my car. I just installed the mr2 turbo tranny w/ lsd. The rear motor mount WILL not line up with the insulator on the cross member. What did you guys do? Can you use the st185 crossmember?
MR2 Tranny swap question - 6G Celicas Forums
I do believe you need the cross member from the st185. If I was you I would call XAT racing and ask them. They were really helpful and cool when I called them.
I'll talk to them when I get back down to florida.