Torque converter

I've heard several people say that converter flash should be around 1,500 less than what you shift at. There is more to converter science than that (more than I know), but I believe it would be good starting point. Ask your Stock class buddy what his numbers are. That's about what mine is, but I shift at around 67-6,800 and it flashes betwen 5,000 and 5,400, depending on the air temp and humidity.

I also have an Autometer playback tach which has proven VERY useful in learning what the engine and converter are actually doing instead of what one "thinks" the engine and converter are doing. They are not cheap, but it's one of the best "tools" I've bought. But I've seen rpm changes on it through tuning as well as flat spots and missed shift points.

Carb tuning can have a big effect on 60' times. Too little volume and/or duration as well as too much volume and/or duration from the accellerator pump circuit will slow you down. But it takes patience, understanding, a handful of cams & squirters and track time to get it dialed in. Good track conditions and suspension are needed to hook consistently for valid comparisons.

Jet for MPH and change squirters and pump cams for 60'-330' times.

I've had high 1.40 60' times running 11.20's at 3,540+ lbs with a 360. 904 with 2.71 low gear, 4.86 gears and 9"x30" Hoosier radial. But there are Stockers out there that do even better with similar combos. (A radial slick will usually 60' better under good track conditions. But they are more sensitive and will not be as consistent under marginal track conditions.)

A truck can be more difficult to hook because of the typically worse weight distribution compared to a car.