ok, i bought one of these from RR. it DID help the power a little bit, but in the winter with the lights on the the heater at full blast (i have no a/c) if the idle got real low from kicking it out of gear coming to a stop the belts would squeel and the lights would dim. also it turns the water pump a lil slower so it ran a tad hotter. if you really want one mine is only 4 months old and has a lil of the blue worn off, its yours for $20. email me.
got bad news for ya. i have a cali cam, header, hiflow exhaust, no cat, flowmaster muffler, k&n, ngk sparks, new wires, blaster coil, carb riser, el. fan and no ac and mine is pretty doggy on the hyway with 11.5 x 30s. can only go 70mph with no wind on a flat in 5th gear. i pretty much only use 5th like overdrive on the road. o and mine is a lil heavy (tin top, bumpers & winch, tires) and mine is an 8v. just live with it or get gears, which is what im ganna do.... good luck. :-/