Hi Stove, Yup, try to find a 261. Check the yards for Canadian Pontiacs. That was the standard six cylinder engine after 1955
I found a extra engine for my two trucks but you cant have it.
It will run circles around a 216, If you find a truck version newer than 1958 it will have a full flow oil filter.

Keep searching. Howie

1 1955 Chev one ton. 261 engine

3 1962 Chev c-10 261 engine
4 1966 Plymouth VIP 5.7 GenIII Hemi
5 1966 Imperial Crown Coupe 440 engine