273 adjustable rockers need refurbish.

MOA said
To be clear, and I don't think I was. The initial install was with the old rockers and shafts. That experience pushed me toward adjustable rockers.

I have used stock length cup and ball pushrods, measured 7.500

If you used that length for a hydraulic cam and 273 rocker arms, they are most likely too long...

We used crane adjustable studs on the rocker arms and ended up with 7.090" long push rods from cup to ball...