1/4 mile times

IMO the torque in that motor should live fine with 3.91's or 4.10's... I would jump up to a shorter gear if you were running a small block.... but I think you would be revving too high with the Big Block when it isn't necessarily "needed", just my opinion.

Here's a "just for reference" kinda thing. My Old Challenger in my signiture, would run a consistant 8.1 1/8th, prob around 1 12.8 quarter (this is at decent elevation). The car was a full weigh E-Body, 440 six pack, .509 cam, 10.5:1, stock exhaust manifolds, and 3.91:1 gears. Also had 27x10.5 Mickeys Streets on it on stock springs.

You'll find alot more ET as you play with the car more, I think a good tune on a dyno, and some rear suspension work will get you where you want.

Tony