It's a truck , 70% of the weight is in the front and you can't figure out why it's hard to put 345 hp to the ground?
Thanks for explaining this to me. My old Chevy pickup, which has a 400cid small block, B&M blower, and a little over 600 hp to the 2.56 rear end, only does high 12s-low 13s on the quarter-mile. However, it does get 13-14 mpg in town, which, of course, would probably be inadequate for your requirements. Do you think that moving some of the weight to the rear, or adding sandbags or something, would help?