Should be a pretty straightforward bolt up swap using the original bell housing back. 55 was an open driveline. If it was a powerglide, the crank won’t have a pilot bushing originally installed. The 235 is slightly longer so a “short” water pump will be needed to clear the radiator.


Larry
Old man᠁Old truck᠁neither one goes very fast. All you need in life is TIME, PATIENCE and MONEY.
If you are missing one component, you'll need an abundance of the others two.