I have done two EA81 swaps into VW busses. One in a '71 the other in a '64.
I use adapters from KEP. The EA81 block is actually lighter than a VW engine. Engine fits fine in both.
Easy to put a radiator in the back. If you use the Turbo EA81 water pump and engine driven fan. I could not cool either bus with an electric fan. Another option is to put the radiator in a 'fake' spare tire in the front.
The stock EA81 is about 70 hp. A mild cam will put it close to 100 hp. The engine will run all day at 5000 rpm so go with low gearing.
My '64 with reduction boxes and a Weber DF carb gets 21 to 24 mpg and will easily cruise at 65 to 70 mph. This is a mildly built EA81 with a cam heads and aviation cam.
Be happy to send pics.
Joe
