A word of advice, XAT will NEVER answer their emails. You have to call them or show up. I bought my DE motor from them for the same swap, for I think 450 for a 1995 motor and a 1993 which had a few accessories that I needed. You may want this too:
zerothread?id=78205
Its my write up from the same exact swap.
Do your best to get an s13 motorset.