I have a motor in my '80 4X4 out of a '84 Isuzu Pick-up, it's got G200 stamped on the front of the head and at the bottom of the block on the driver's side by the oil pan. The stock motor for my truck is a G180F. If your engine is a G200 it should bolt up to the stock everything. They even take the same head gasket. I think the G200 is supposed to have electric ignition, but mine's set up with points. About the rebuild stuff, I have no idea, sorry.
_________________
Richard Barnes Salt Lake, Utah
1980 Luv Mikado 4X4
http://geocities.com/luvtruck2004/