How about the Side and intermediate housing in a 13B-REW.  Can I use them instead of my 91 TT housings?  i.e. I know the exhaust manifold will fit, how about the itake manifold, water pump front housing, oil pan, oil pump, etc...    

 

I also meant to mention that the front cover, and WP housings will fit fine, though you will find that the REW housing has  an additional bolt for the front cover.  Not a problem though.  

 

Rusty