Another head swap question.

It would be nice to use the 1967 rockers since they are adjustable. That is mandatory for solid lifters but nice too for hydraulics to adjust the preload, such as if the head is milled and don't want to buy custom-length pushrods. But, I understand the hydraulic lifters received oil via the rocker arms and thru the pushrods. Unlike most engines with hydraulic lifters, there is no oil supply to the lifter bores. At least what I recall reading.