I have a set of the DeTomaso cast aluminum valve covers that require a spin in breather. My car has a throttlebody EFI system and K&N air cleaner assembly. I've searched around and am stumped on what I need to do to get the PCV valve to fit in the valve cover. Can any of you tell me what you have done to solve this? Does anyone make a PCV that fits the spin in valve covers or is ther an adapter I need?