I take it its not a roller block,no cheap way for a retro fit to rollers

my 88 360 headed 318 was flat tap cam but roller block

I used all 1990 roller gear to swap in a lunati 60710 roller cam

the early stock roller lifters are not oil thru

the 90s are oil thru with hollow PR and oil both ways...thru lifter PR and the old LA style thru head and rocker shaftes

OU812 has a very good set of retro lifter with link bar and drop in IIRC..well worth the $ for a retro set up

has roller oiling and long skirts that dont uncover the oil gally oiling..

way ez and cheaper to start with a roller block if possiable