Assuming your truck is 3800lb curb, say 4000 down the track, here is what the DeuceCoupe Gonkulator says. My converter algorithm is kind of “typical” but as noted, it makes a difference who made the converter, they can be better or worse than this.
I Gonkulated these with the equivalent of 2-1/4 duals or a 3" single which I think would be about the same, mainly they would sound different.
3000stall 4.11
2.21 60ft
9.72 at 71.1 1/8 mi
15.39 at 85.5 ¼ mi
7.1 0-60mph
2500stall 4.11
2.23 60ft
9.79 at 70.9 1/8 mi
15.47 at 85.4 ¼ mi
7.2 0-60mph
2000stall 4.11
2.35
9.98 at 70.8
15.66 at 85.3
7.4 0-60mph
It may not look like much difference but you will really feel .12 in the 60ft, it will feel like a dog.
I’d go 2500 with 4.11 gears if not on the freeway too much, but it will be turning almost 3500rpm on the freeway, the piston speed will be near supersonic with that big long stroke. 292’s like to lumber along.
3000 stall doesn’t seem much quicker, and that way if you don’t like the steep gears you could go to a 3.73 or 3.55 gear later and the converter would still be a good match.
2500stall 3.73
2.28
9.92 at 70.4
15.57 at 85.7
7.4 0-60mph
It really wants that 4.11 gear but if you have 3.73 already I’d leave it for now and try it.
In fact, I’d leave WHATEVER gear is in there alone til you try it, get a few timeslips, see where you are and how you like it.
2500stall 3.55
2.31
10.01 at 69.9
15.66 at 86.3
7.6 0-60mph
The taller the gear the more it hurts. A 3.55 is a good cruising gear with big truck tires but you’d pay the price in town, kind of a dog.
