440 build for a tow rig/"muscle" truck?

I have a 76 short wide with stacks,440 forged pistons .110 down in the hole,440 source heads,9:75.1 comp,275 durration 110 center hyd cam,18 degs initial,38 total at 2900 rpm,750 edel carb,performer rpm intake,727,2400 stall,2.94 sure grip,ac,cruise, best of 12.9 mpg,daily driver,have towed 4600lbs, never lacked for power, ultra-bell 2 months on back order so far have 46rh to build then put the 9.25 with 3.55s back in,