Does the best gasket seal neoprene seal work well in a later 235?
Can't say- - - -I've never used one. Any engines I build in the future are going to be machined for a full circle lip seal, which makes the effectiveness of both of the 2-piece seals a moot point! I made a fixture that allows my cylinder boring bar to be attached to the back of the block to cut the counterbore for the full circle seal in less than an hour.
Jerry