head oil suppy ?.

Eureka... that's why. Not an LA...lol I would restrict it, yes. You can eitehr take a grub screw and drill a hole in it (I'd use .060" hole), then tap and run the screw below the deck... or drill it with larger step at the deck and use a holley carb jet to "tune" the oil flow. Factory LA systems only oil the head/rockers for the 20-30° that the camshaft connects the galley up from the mains and the ones up to the heads. The HV pump might not have any pressure or volume issues, but it will pump a TON of oil up there because it's a 100% pressure fed now. Just as a "for isntance... the hole that straw is in looks like 80% of a main bearing feed passage... That's a lot of oil...