The last year of production for 235s was 1962.

A 235 is a fairly easy replacement for a 216 (what was most likely originally in your truck). The blocks are the same lengths. Depending on the year and origin of the 235, you might have to do minor adaptations of motor mounts and water pumps. You would use your original clutch housing and clutch assembly (and starter).

Find out if the motor is a 235 and its year of manufacture.