Hi 4ontheFloor,
The O ring goes in the groove on the distributor shaft.
Is it supposed to be a round, or a square shaped O ring for the 235?
The guy at the auto parts store said the paper gasket is supposed to go between the distributor, and the engine block.
He ran some different numbers on some other inlines from the early to mid 60's GM vehicles, and one of them was the paper gasket, but he said he's not sure it's for a 235. :confused:
David
