Gotta' win this one
With a 4 speed I would use the slicks, drag radials typically don't like a 4 speed. Your trap rpm will be down a few hundred rpm with a taller tire though. Whats your red line on your 340? I ran the 26 inch BFG drag radials on my dart but its an auto, it hooked well but only runs 12.80's, would trap at 5800 rpm with a 410 gear. I agree though, the BFG's are junk compared to other brands of drag radial.