318 to 390 stroker

I've got to post some video up of this thing in action. It's really stout for 4200 pounds with 33X12.50-15s. With the NV4500 (5.61, 3.04, 1.67, 1, .74, R 5.61) you can be at a 35mph roll in third and slam into second and it will break traction and kick sideways. It runs right on par with a strong 440 in one of these trucks. With 3.92 gears & the 1.67:1 3rd (6.55:1), the 6500 rpm 95 mph third to fourth power shift breaks traction. We'll probably do 4.30 or 4.56s before too much longer.