Paul offers several troubleshooting tips to solve this reader's problem.
Would it be an option to install the wide deck version in this airplane or is that a bad idea?
There is no doubt the 200 hp will make your airplane a rocket ship.
Conical type mounts are used on the Lycoming O-235-C series of engines and several different models of Lycoming O-320-A, B, and C series.
Always be certain to ask many questions before putting any money on the table!
Everyone is always looking for more horsepower and lower fuel consumption.
Lycoming has a Service Instruction to answer that question.
Oil is one of the least expensive things you can put in your engine,
What sounds like a good deal could end up costing much more in the long run.
I'm probably opening a can of worms by answering this question.