I was on a web site looking at the rod and main bearing specs for the 50-55 216 and 235. The crankshaft rod and main bearing specs are the same for those six years. I know that around 53-54 the 235 went to a pressurized oiling system. Can you use 53-55 235 bearings since the crank specs are the same as a 216?

Engine specs:

http://www.secondchancegarage.com/public/468.cfm