In the W350 with the 727, it would never get better than about 12-13 no matter how or where you drove it. When I added the 518 with lock up and going to TBI, it has got 18 going up the 2 big mountain passes here. I'd suspect flat land at 65 could get it up to 20. That's with 4.10 in the front/rear also.


Matt
69 Dart Swinger 340
83 W350, Megasquirted with 46RH
Old news: 72 Demon street/race mobile
Latest: 70 Duster backhalf car
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