Passon Performance 5-speed
I was # 18 on the "list". I got mine a few months ago for my 1970 e-body and it has about 400 miles on it now. I would not take it out if you paid me. I lowered the rear gears from 3.54's to 3.73's, and it spins at 2400 rpm at 75 mph with 325 50-15's.
There is no other way to describe slipping it into 5th gear after merging onto the freeway other than to say it is relaxing and my mileage has gone up measurably.
Although I have not done it yet, as I am trying hard to break it in properly for 700 miles before loading it with the full fury of 720 hp; winding out 4th gear and then slipping it into 5th at full throttle will likely induce a fear of sudden flight as the speedometer needle quickly swings past the "H" on the bottom of the 150 mph speedometer on the Rallye gauge.
No wonder they put wings on these cars.