I need high performance PCV valve. 1970 455 flat tops, #96 heads, Bullet (hydraulic roller) cam...230/238 530/530 on a 112. Suppose to have 4 degrees advance already in it, so its installed straight up. 0 lash and a quarter turn on 1.62 roller rockers.
Have about 9.5-10 inches of vacuum at 750-800 idle rpm. If I unplug ( and block off the carb and pcv tube) the PCV, I get 12.5 inches of vacuum.
I figure the current PCV is rated wrong for this application, therefore wondering if anyone has a P/N for a lower vacuum rated PCV.