I used a 42RH out of a 95 Dakota 3.9 in my 78 Fury, and the pressure switches from PATC. The 500 is good for the lower 2.74 first gear ratio, can still be beefed up plenty strong, and in my application, I used the stock 3.9 converter. For me, it'll stall to about 2300, and flash to 2500. Id never run anything but an OD in a mild street car after putting it in, and its fully automatic. Even with 3.92 gears and 27" tires, 80mph+ is a breeze in overdrive and converter locked up. I don't even have $300 into the whole swap, and that's including the cost of the trans. Well worth the effort to put it in!