Passon or Tremec TKO 5 speed gear box consideration.

The thing to remember on the t56 is that it is a double overdrive. 5th gear is around a .74 and 6th is .50. You will have to do some serious freeway to use those gears. Both the TKO and the T56 require some cutting to install. The T56 takes up a lot of real estate. If you are comparing prices between these and the Passon unit, figure in the cost of fabrication also.