Hi Mike,
Well, I suggest you to find a "short" bellhousing G50/00 , G50/01
If you can't find one the you can find more easily one from a 1990 C2 G50/03 who has also a ZF lsd 40%.
Check classfieds at :
www.pelicanbbs.com www.rennlist.com www.ebay.com
Six speeders are very long.
good luck