Original ’74 Chevy 350 short block, Flowmasters… 1974 Chevy Camaro LT.. Sea Foam through the PCV hose. Get the engine to normal operating temperature, take the hose from the PCV off, let it suck up 1/3 can of Sea Foam, put 1/3 a can in your gas tank, 1/3 in your crankcase IF YOU PLAN ON CHANGING THE OIL WITHIN THE NEXT 300 MILES. Connect the PCV line back, Wait 10-15 minutes (some let it sit for a few hours, I waited ten minutes)… Start her up and rev her