I have a 9.5" PI Stallion that was behind a 351W in a stang. I think it's a 4900 right now, but the owner wants a 5700 stall now. Can this one be sent to Neal Chance or someone like that to be restalled and still be a good converter? Last time I spoke with someone about getting my own converter restalled, they said there was a limit to how much they could do with my 9.5" PI converter. I believe they said 4300rpm at the most and any higher would be super inefficient. The owner of this one doesn't want to buy a new converter since he just spent $300 to buy this one(used) and $250 to have it rebuilt by a local guy. I guess I could sell it, but I just thought I'd give it a shot and see what ya'll think. New converter or can we work with what we got? Car is 3100lbs, C4 trans, 4.57 gears, 500-600HP.