If you are using a flat tappet cam # 1 you need to fire the engine with Delo 400
oil and comp cams cam breakin lube or suitable substitute. Run the motor for a minimum of 20 minutes from initial start up at 2500 RPM . That means you have best pay attention to the specs you have set your carb., timing, etc. at . Also as your engine is fresh and tight make sure you have adiquit cooling including a very large fan to keep it cool while you break in the cam.