A Powerglide from a 1955-61 passenger car would be a bolt-on swap to your engine if you use the adapter ring that bolts to the 235 block instead of the standard shift bellhousing. Ditto for the flex plate and starter. You would lose the foot start pedal, however. A 1950-54 flex plate and starter would be 6 volt, if your truck hasn't been converted to 12V. I believe the Powerglide equipped cars ran a 3.55:1 rear axle ratio, so check the rear end in your truck to see if it's got that gear. I think the stick shift cars ran a 3.70 gear, but either one would probably work OK. Switching to a TH 350 would give you one more gear, but the conversion is a lot more involved.
Jerry
Last edited by Peggy M; 10/22/2023 1:07 AM.