Valve guide & spring seats on Stock heads.

[Myron Piatek]

The rule book says that "Any valve spring permitted provided no modifications to head is performed."


It sounds like dual springs are allowed. But does that mean the guides and "step" on a Mopar small block head can't be modified anyway? (For different seals/inner springs/guide - retainer clearance.)


(I hate the rule wording where it sounds like you can use something, but you can't change anything to make it fit!)


Any insight here or via PM would be appreciated.