Rebuild 904 or swap for 727?

"No performance 727 should use a stock drum"...that's just ridiculous. And you yourself state that the 727 sprag is only weak under misuse. You talk about the 904 being good enough for the average guy, but in the same post condemn the 727 for parasitic loss, even tho the difference in the quarter mile is .15 of a second. If you can afford an extra $2-3k to gain .15 of a second in the quarter mile, then you are in a distinct minority as far a I'm concerned; and I don't care about your car. I'm on here to encourage home builders to work on their own transmissions; rebuild them, repair them, shift kits, whatever. The problem is that if you make a slight mistake in your rebuild, a 727 is much more forgiving than a 904. The 727 can take more overrlap and slippage than a 904. If your kickdown is out of adjustment, a 904 will fry ten times faster than a 727. And hey, a weak clutch pack is considered a weakness in the real world.