Cam swap without pulling motor

I’m confident that heads that used rotators on the exhaust valves did not get springs with dampers(for either valve).

I’m also pretty sure the rotators wouldn’t be paired with 4 groove valves.
(The reason for the 4 grooves is to provide rotation)

My recollection is that the installed height for a 4 groove ex valve ends up slightly taller than the 2 groove ex valve(when checked on the same head with the same retainer).
I’ll look thru my stash to see if I have a two groove ex valve kicking around.
If I do, I’ll do the measurement….just for some added “content”.
Edit- I don’t have a 2 groove ex valve on hand.

Can you check the coil bind height of that exhaust spring?
I’m curious to see how far from coil bind it was in operation.