A lightweight!
I think the weather had to contribute a decent amount, and will agree with the others that the converter is too tight.
I have a similar mild 493 in my Plymouth, the 9.5" converter flashes to ~4400. Even the old off the shelf 10" "3000 stall" flashed to ~4k. I normally run 3.55's and a 28" tire and weigh 3700 lb at the line.
It is pretty light for an all steel 1/2 ton truck. Lol. What is your combo and what does it run? If you don’t mind me asking.
Combo:
66 Belv
493; 10.25:1
-516 heads, big valves
4150 M1 w/ FITech
520/520 260/266 @ 0.050
TTI 2" headers, 3.5 x-pipe, muffs and dumps
727; 9.5" converter, flashes to ~4400
8 3/4; 3.55's
tires vary, but normally run a 28" radial
Last year I was playing with a small plate kit, so didn't have too many runs on motor, ran 11.31 @ 118 at Milan with ~1700' air last time out, and 10.83 with a 0.050 jet in the plate...
Post up next time your are heading out, I'll try to make the trek. I used to work in Ann Arbor, so it was easy to shoot down to Milan, now I work in Pontiac...
