Solid roller cams HV oil pumps?

If you want to run a roller solid roller lifter part number 5270 morel you'll have to open your wallet never look back they are the best ultra pro big block Mopar you will need to have spring pressure 250 to 350 .600 to 850 open pressure they cost about $1,100 you can get the best deal from competition engineering parts summit sells them for more as far as your distributor drive gear contact milodon I don't see it necessary to run a half inch pickup tube I've never had to I run the 3/8 with the seven plus one pan regular volume oil pump melling m63 HP use a milodon part number 21550 adjustable pressure regulator goes in the back of that oil pump put a manual oil pressure gauge in your engine block use a drill pull your distributor out use a 5/16 hex drive bit Mopar related oil pump drive attach it to your drill turn it the same way the engine rotates set this oil pressure cold at 75 lb don't ever look back that's all you have to do you don't need any more oil pressure than that on a big block Mopar if you have your engine apart you want to take number for main journal and increase the oil feed hole to your lifter galleys as big block Mopar lifters lube through number four main journal contact Hughes engines he sells the reamers and the instructions this will allow more oil flow to your lifters use amsoil 5 30 racing oil remember if you run solid roller cam every few years you may have to replace your valve springs depending on how hard you run it if you drag race a lot also every year you can if you want inspect your lifters but with these lifters you probably would never have a problem