After a 5 year rubber replacement, we started the engine to check for leaks and balance the carbs. In the course of the replacement, we had removed a fuel regulator which the previous owner had in the line to the carbs from the fuel pump. Checking with Lockwood Aviation, we had been told that was non standard and not needed to regulate fuel pressure. After starting, the engine ran well for several minutes. Then both carbs began venting and flooding. I consulted the previous owner as to why the fuel regulator was installed. His response was the the carbs had begun to vent and flood. So, he had installed the regulator to reduce the fuel pressure and stop the flooding and venting. The solution I have in mind is to replace the both carbs.

I am wondering if anyone has encountered a similar situation, or would like to comment. Thanks.
Bob