Thanks for the input guys!
I was looking at the VW motor because it weighs so little.
I'll tell about the application that this generator will be for.
I am looking at building a mobile fabrication shop on the back of my Frontier. The bed will disappear and a flatbed type rear end put on. I'll probably modify the rear axle placement and move it back a foot and extend the bed. Put on a small lift kit (4"?) with heavy duty springs, swap in a solid axle in the front and add a divorced transfer case.
I'll have to modify the motor to put out about 30% more power to carry all this extra weight. Shouldn't be a problem with a supercharger, some cams, and exhaust.
Anyway I'll be able to park, set up a 25'X25' tent and pull out the welder, mill, and maybe a small lathe.
I'll be able to travel around the southeast doing emergency repairs, remote area fabrication, and other stuff.
Probably going to be doing custom car stuff wherever I am. Thinking about turbo swaps for most of the popular imports and even domestics on location.