I don't know how it goes for that specific engine, but I can say that, in my experience, those blue rubber gaskets are like the Messiah for fixing oil and tranny fluid leaks. I had a 327 on my Chevelle that I was sure liked to drip at the timing cover just to make my BP go up, and it had the old school gaskets on it.
The 350 in my Panel Truck has the blue rubber gasket, and the only leak I noticed was right after I reassembled it and fired it up for the first time. I cranked down that one pan bolt, and no more leak. May be worth seeing if they make those gaskets for the 235.
Of course, by posting this response, I've probably now jinxed myself with new leaks.
