Rochester 'B' wasn't released till the '50 model year Curt.
You must have a later 235 in your truck. That power piston
is a critical part to the performance of that carburetor on
your engine and is held to a fairly close fit since it's a
vacuum operated device. I don't see anything wrong with that
one from the angle that it's shot at. Just be carful when
cleaning it, you don't want to reduce the clearance and it
must be straight as it pushes the ball off it's seat.

DG


Denny G
Sandwich, IL