Sorry if it sounded that I was putting your plan down. Thats not what I mean at all, to be honest anyone who buys any atv is never going to get anywhere near their purchase price, or add on parts price if they try to resale it. We dont put $$$$ into these bike to make a profit, we do it because we love our 20 year old, outdated, money pit bikes.

I do have to admit, it would of been sweet to build my 85-86 motor up, But it would also been very discouraging when It grenaded shortly after I got it. 

I tell you what though, (light bulb went off in my head) since I have both years of motors pulled apart, I'll "mock up" what your talking about. I will put my 90 crank in my 86 cases and see if I can make something work for you, by switching jugs, and seeing how much if any kind of spacer would be needed. I'll post up some pics when I get this tested tonight.