$850 to build a 727 is way too much. But that's just my 2 cents worth. Like the other guy said. They aren't hard to build. Can replace all seals, bands, clutches, Steels and bushings for about $150 in parts. I build them for all the mopar drag racers around here. If i can help? Let me know. Good luck!
i know this is an old thread hopefully you are still around....if so reply back i was wondering if yoiu could answer a few questions as to what parts to use in a 500 hp 904 trans ...if thats possible? thanks in advanbsce