Can I "borrow" rocker arms from my '65 273 for my '71 340?

dibbons said
Never thought about galling. Anyone seen the 1970 340 TA heads with factory adjustable rockers and hydraulic camshaft? I wonder what those rocker shafts looked like?

They were grooved and originals are worth more than gold. I have actually seen a few originals come apart for the first time.