I have said this before. It's not all about the cam, it's the complete setup. My 69' Dart (in photo) has a 4 speed and I install the 68' 4 speed cam when I rebuilt it in 88', from DC as a Hemi grind. All other items on the motor, air cleaner to exhaust tips are factory. I also rebuilt my 72; Dodge with a 70' 340, but installed the auto cam, also a DC Hemi grind, in 89'. The van seems to run stronger. Holley 650, single plane intake, Accel distributor with super coil, solid copper spark plug wires, appliance 2 1/2" chambers with 2 1/2 pipe into walker turbos, coming out in front of rear tires. 295 T/A radials. 355 rear gear on 1.5 ton springs. Stock converter in a HD 727 with some internal adjustments. I always keep my eye on the fluid color and change it around every 50,000 miles with type "F" fluid.