Crashtd420- i want to know where u bought the fuel pressure regulator. i recently bought one but will not lower the psi bellow 9. This might be the cause of my car running rich all the time. Im running an l16 stock. i dont know what head it has. the carburetor is weber 48 on cannon manifold. trying to get my car to run right. I put a wideband 02 sensor yesterday and found out it is running really rich idle. i dont know how to adjust the carb to idle. just putting out there what my problems are