340rocker oiling

whats puzzling is this engine ran great until i changed head gaskets,i didnt measure the old ones i suspect they were the thin mopar kind.after i put it back together its been ticking like a few bad lifters.i bought a pushrod length checker and they werea bit short .0 preload about 7.520 so i bought the 7.550 to get me in the .020 -.040 preload range.it now still makes this noise,i switched rockers on either head and will start it tomorrow again.but last time i ran it with valve covers removed it seemed very little oil at all on the rockers or shafts.i cant imagine that a head gasket would be in wrong and block the passage on each side.the new pusrods are hollow the other ones arent.the gaauge says 60 psi at 1000 rpm.