I dont think it would run any worse with the 3.79 crank, than the 4 inch crank. The fact of the matter is that EVEN w5's are too small for anything over 400 cubic inches, Imo. I know my w5 headed 422 was flat gulping for air at about 1150 feet in the 1/4. The 4 inch crank will lower the effective power band down a little, and that might make it more appealing.

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8