With a good valve job and "decent" bowl work they should flow 230-240....... And he already owns them.

With some proper on-center bolt on stands they would be able to use normal rocker gear.

Still worth using IMO.

To get an idea of just where I was with those things, I'd mock them up with some shafts sitting on top of the Indy rocker shaft clamps, and see where something like a Comp Pro- Magnum rocker sits on the valve.