273 hydraulic cam/pushrod/adjustable rocker combination.

I have a 318 with same set up, adjustables with hydraulics. Cam is almost identical to yours, not that it matters.

I took .010 off the head and about .080 off the deck. KB167 piston .004-.006 below deck with .028 head gasket.

Pushrods are 7.060 long. The custom pushrod set was around $200.

Also, one of the heads, I had to elongate the holes where it passes thru the head. It was hitting same place as yours. Precision machining, casting, was not a priority for dodge way back then. Not impressed.

I have to either elongate the holes on my intake manifold or have it machined .030 per side due to misalignment on intake bolts.

If the threaded bolt holes are low (alignment) in the intake manifold holes, your heads or block,or both have been machined like mine is.

If your intake was machined as well, there won't be a misalignment, a stock manifold would reveal the truth.