Yo marc. I sent ya a message!
Alright.. jbot is spot on.. hence half the reasoning for stretching it.
Move the rear end back about 7/8 inches.. whatever it was. Damn near keep the seat position just better seat..
Better ratio of being centered over both axles.. sure the rear to front is like 60/40, maybe more..
One thing that's forsure is when it gets in the powerband, I can still feel the front end lighten up on me.. not uncontrollable or anything.. but I just feel it.. I can lean forward just a little bit and problem solved.. if I kept the wheelbase stock.. I know for a fact that it wouldn't even be rideable. (Like jbot said)...
So all in all, the subframe stretch is sweet.. handles fine. Goes straight. Yeah. I dig it!
If you want to do it yourself and fuck it up? Hell yeah do it, especially if you plan to make it a total ripper.