Tom,

Most likely, the 261 is the easiest way for you to go, if you want a boost in power (for all the reasons Jerry stated). In Canada, you might be able to find a Canadian Pontiac 261. It is similar to the truck 261, except that the Pontiac has hydraulic lifters.

Tim

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.