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I think he means the solid hold downs that clamp the top of the shafts to the pedestals instead of the cheap ass stamped metal Mopar pieces.

I used those as well on my low deck and shimmed the rocker pairs to avoid rubbing the PR at the tunnels. I also upsized to a .375"/.080" wall PR. Bushed lifter bores and edm lifters as well.



Yes and yes. Solid shaft hold downs. Sides milled slightly to generate clearance along the shaft and shim washers used to line up rockers over the valves. Bought the shim washers in packs of 16 or something like that from Mancini. I upgraded to 3/8" pushrods at the same time. Sweep over the valve was centered and tight though no photos or measurements.