With 5.13 gears and 32.5 inch tires my 51 turns 3300 at 60. 2800 in overdrive (17%). Running empty my warmed over 235 could easily pull a 4.10 axle. Not so, loaded to the gunnels as it usually is. I'm following along because I've considered eventually installing a SBC so I don't have to shift gears so much.

1951 3800 1-ton
"Earning its keep from the get-go"
In the DITY Gallery
1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.