904 advice needed

My car has a 904 with 72,000 miles on it that worked perfectly when i tore the car down. I have built the 273 engine to 250/275 Hp and will be running an 8 1/4 locker with 3:21 gears. I am trying to decide on whether to try to find a local shop that knows what they are doing to recondition the transmission or buy the TCI package which appears to be a mild performance bolt-in setup. I have been quoted the high side of $700.00 to recondition mine. I am interested in any thoughts you might have or experience with the TCI products. Thanks for looking---------------:toothy8: