360 swap to adjustable rockers

What you need to change is the pushrod ends. So new pushrods are in order.
Theres a length change (Slightly) and one end is normal while the other end is a cup for the rocker.
You need not change to the banna grove shafts, though it is a good item to have for it has better oiling abiltys.
It is not mandory to have.

The 273 is not the same as newer adjustable rockers. The 273 is an interfearnce fitting while the newer rockers have adjusting screws and lock nuts.
I'll have to find my 273 rockers and snap shot them next to my Comp rockers.