I would go either with the xtra 10 or the edge, but i personally would NOT go with the xtra 12 unless you plan to change the front suspension also. The machine will be very awkward and have a goofy center of balance with stock front ifs and xtra 12 in the back. This may be the same case with the edge suspension, but i have yet to see it done. Erick might be doing the edge susp in the regular indy chassis, and I for one am curious to see how it looks when done. I'd say go for the xtra 10, they are plentiful, halfway decent priced and will offer a much improved ride over the 8" susp. As far as I know you will just have to do like has already been stated, move the support plates and drill new holes to bolt it in.
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