I put one in my '71 Satelite a few years ago, and really like it. The car, even with 3.55 gears, was just a pig on long trips - noisy, sucked down the fuel. That trans was an excellent upgrade. I'm running a 340 with a little over 400 hp, and the Satelite gets around 18-19 mpg, which is the same as I get with my '68 Dart with a 225.
-dulcich