Cab, according to the egt's and reading the plugs, and the A/F readouts cylinder balance has not been an issue. I think a motor this size would benefit from more plenum volume but any spacers under the carbs would force me to cut the hood and I'm unwilling to do that.
Anyway the truck has more hp than it can legally run at the strip without slowing it down now. Even running it low 10's is real exciting in the left lane at the local track. There are a series of small bumps just before the strip which unloads the suspension. Every pass in that lane is a white knuckle ride.