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.
It took me 5yrs of saving ssi check to build this motor now because the bulk of the parts are not useable If I would have bought locally I could have returned now I have a flowed set of revalved heads on a stock lower and an intake that I will have to build brackets to have ac and stock valve train after buying hi$ valve covers to run it. So I basically ruined a stock 5.9 that I could have just put in 5yrs ago and drove it so yeah I'm p$@##!% off at myself for being so stupid to let the internet take my money and 5 yrs of my life.