Failing Mag check
1978 PA32 RT 300 Lycoming I0-540-K1G5D. Just did the mag overhaul less than 30 hours ago and its failing the mag check. Should be no more than 175 RPM drop and no greater than 50 RPM between mags. Testing right mag drops 100RPM left drops 200. Adjusted the points and re timed with same result. Can anyone point me in the right direction to solving this? Starting to think spider, injectors, or engine fuel lines clogging?