shim the rocker studs????

No problem! I've heard both bad and good about PIE. No telling what they sent you, but I would assume a SBC rocker.
Only parts I've heard good was his tuning fi systems. But if I wasn't in Tx. and him in Del. this wouldn't have turned out this way. And I bought the parts through him cause he was doin my heads. In his defenseI can't find anything wrong with them but I haven't used them either.