the bus motor will almost bolt right up, you just need a bering pressed into your flywheel (so I understand, I'm using a porsche flywheel/tranny setup) then it will boult right up using the stock bus flywheel, clutch and pressureplate. and you will use the starter that comes with your tranny.
http://home.att.net/~NEXTGEN/index.html
this guy wrote the book on type4conversion, literally.
VB