I'll have to agree with some of the other posters and suggest a powerplant exchange.
Having worked with the Dripsy a few years ago, it's fantastically easy to look after by virtue of how primitive it is, but the oil... So much oil. With all of the old engines like that, you get good ones and bad ones, each has it's own character. I came across engines which would burn (and/or throw out) almost as much oil as fuel, and others which didn't use much more than your average flying school 30year old C152.
But switch to a Lycoming, and I can't see any reason to give up an airframe like the Chippy!