Passon or Tremec TKO 5 speed gear box consideration.

Revhendo said

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.

Click to expand...

You can choose Close or Wide ratio T56.
T56 Magnum Gear Ratios
Close: 2.66, 1.78, 1.30, 1.00, 0.80, 0.63
Wide: 2.97, 2.10, 1.46, 1.00, 0.74, 0.50

Passon A-855
2.64, 1.92, 1.40, 1.00, 0.70

T56 is definitely the most expensive and requires tunnel mod. They say also say not to exceed 450 HP in 4th gear.
I like the idea of a straight swap with Passon and that it is a couple thousand $$ less than a T56 all in, but at $5300 the A-855 is still $2505 more than a $2795 GVOD.

Merry Christmas!