PCV issue

Thanks again for all the responses. I'm getting about 16 PSI of vacuum at idle. As far as the valve adjustment is concerned, I have new locking adjusters and have adjusted the valves to .010 for Intake and .018 for exhaust. The motor seems to running good in every regime other than idle.

If I do drill out the tubes in the carb, what size bit should I start with? Thanks again. Jon