What is a good brand of lifter? AC delco has OEM for less than $20.00 each and another P/N that's as much as $35.00 each? What's the difference between the 2? I have seen lifters for as little as less than $5.00 each (ewww! That's too cheap!) and up to $35.00 each. I want some roller rocker arms too; I need an exp. recommendation please. VIN 3GNEK12ZX6G101883. Flex Fuel Engine.