Replace rocker shafts for sure
I disagree with footnote 104. If the geometry is correct, that rocker will take a 1.625 spring. Honestly, I can’t understand how T&D doesn’t get this. They tell people their stuff is bolt on, and it damn sure ain’t.
BTW, I get pushrod oiling, but I don’t use it with any block that has OE chrysler oiling. You can get enough oil to the shafts and rockers with a grooves cam, but you can’t control all the leakage at the lifters.
As I’ve said before, if the system is correct chrysler oiling of the shafts and adjusters are good to well past 8500 RPM. And that was using bushed rockers and 340 on the seat and IIRC 800 or a bit more over the nose.