There were a few 235s with captains bars.
If the casting number says 261 at inliners its a 261
If you have a 54-55 261, then you need 54-55 261 parts which are different than 55-62 parts.
Just like a 54-55 235 is different from a 55-62 235.
For our trucks, you've got the best one. You can use the 54 water pump
