340, hydrolic lifter 273 rocker solid pushrod no oil hole

The lifters do not oil thru the pushrod.
Rockers do ONLY on Magnums only (But not Lifters)
Rocker on regular LA feed from block into heads and then
to the rocker shafts
Lifters are feed thru a large internal Passage
in the block as do many engines that
have camshafts in block.