My buddy has a 72 Dart with a very similar motor as mine (318, xe268 cam, edelbrock 600 cfm carb, headers, 2.5" exhaust, flowmasters, MP dizzy, 3.21 gear [open], 2500 stall). It runs near to the same times that I do in my duster, which would be mid to high 14s usually.

When trying to do a burnout, he will stand on the brakes and bring the revs up. Once it reaches 2500 rpm, it will not rev higher, or spin the tires. When letting go of the brakes slightly, it still will not let the tires spin.

There should still be around 320-330 ft lbs of torque with this motor and it makes great power, even if the cam is a bit aggressive, so something should still be happening. Timing is set at 16 degrees initial and the motor runs flawlessly and efficiently.

Could the drums brakes in the rear be too tight, or is the open diff more of the issue?

2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.

Searching for new A or B Body Project!