There is some 235 parts on ebay. I search for 235 chev* I have seen flywheels, bellhousings and complete engines going for under 200 bucks. I'm converting my 35 chev master car to a 235. I started looking locally and found an abundance of these old engines. Put a wanted add in the thrifty nickel paper. If you have one in your area.
Good luck.
Brent