an SR and CA SMIC are identical in just about every way. the SR has a BPV is about the only difference if I remember correctly.a KA trans will work with the CA bellhousing. you may check and see if the clutch fork is just funked up and not allowing the shifter to move.
sounds like you have a wiring nightmare ahead of you as well. Might consider getting a megasquirt setup and save yourself the headaches of trying to piece it together.(this will also help with your maf issues and potentially the CAS if that ends up being bad)
when we hear stories like this, often the ECU is Fubar as well, so you may want to have it tested on a running car........ specially if it is a "_____ tuned" (blitz, tomei, ect)
Ps I hate to tell you, but who ever you bought the motor from will not be sending you ANYTHING they still owe you. None of those companies ever make good and just give you a run around till you get tired of fighting or till that 30 day warranty is over.
unfortunately they have no real reason to help you out(they have their money) and you have little to nothing to wager against them. Even putting them on blast on the web means nothing as a new company domain is just a few dollars these days. hell seasoned tuners have even pulled this recently and its becoming a real rare thing to find anyone who cares for their customers anymore.
Maybe you will be lucky, but I wouldnt be holding my breath. GL to you.
extra stuff 
http://forums.nicoclub.com/zer...s-ect
