Lol DR I would but I've already got a really fresh 87+ bottom end. I've got all new bearings an stuff for it,, plus I like the 87+ a bit more than 85/86 lol and also I'm piecing together a 500 mill so I can go from 250 class to open class in a snap! Lol

I'd go with the 2 down tubes. No bending to have to worry about.

And I would assume that since the  85/86 has different port timing than the 87+ that the CDI will have a different timing curve as well so I would go ahead an get the 87-90 CDI. If I've got more than a couple spares I'll hook you up with one.