I had this posted on the Ask a FFR Tech page but did not get any responses, so I will try here.
My WRX 5 speed is very broken (after 1,150 spirited miles) and I would like to replace with the STI 6 speed.
The 818 is an early one, chassis # 97 and has a WRX 2.0 from a '94 WRX.
I found a newly rebuilt 2007 6 speed but it doesn't have anything else, just the transmission.
What parts do I need from either Subaru or the local used parts place?
I am assuming inner CV joints and maybe clutch pressure plate and flywheel.
FFR has the adapter but will the axles work? Is there anything else I need?
Is there a thread in the STI trans installation? (I couldn't find any).

Would like to get back on the road ASAP and couldn't find clear info on the forums.

Thanks,
Pete