"Tim - are you saying the 55 and earlier 235 water pump can be used without adapting the block as per Dave's adapter kit?" "Sedgewick"

I might have stated/phrased this incorrectly: (?)

"With 55-2nd or later 235/261 block, use the 1955nd or earlier 216/235/261 short-shaft water pump (and Pre '68 Dave's water pump adapter plate [chev235guy.blogspot.com] that can be found on ebay)"

" . . . a 1956 era 235 and the fan blade is about 3/16" from the radiator . . "
That block/engine would need Dave's adapter and an earlier style (higher-mounted") water pump.

Your 1956 engine would need the adapter and an earlier style water pump.

1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]