If by "properly" you mean "high performance" ...I've seen them advertised for $5,000. But any yayhoo can throw a 727 together to withstand 400 horse. So, sure, If you can find a five plate direct drum trans and convert it to non lock up, buy red eagle clutches and a few other goodies, assemble it yourself without overlooking anything..still can't withstand 450 horse daily driving...still not nearly as strong as a stock 727. Just compare a 904 plate to a 727 plate and the HUGE difference becomes extremely obvious. Whereas a 727 can hold 1,000 horse with that same investment. Just with Red Eagles and a thin direct top plate with six reds in there; kevlar bands...
