Anybody every play with or run a 576 head

I used a set of the MP “308” heads for one of the oval track motors I was working on when those were current in the catalog, but I don’t recall what actually came in the box......308’s or 576’s.

The valve size rules were 1.88/1.50, so I had to put ex seats in them.
No porting allowed.
Nothing mentioned about valve stem sizes, so I didn’t ask any questions and installed bronze guides and used 11/32 stem valves.
For the intakes I just cut down .100 long 1.94 SBC stainless valves to 1.88.
Exhaust valves were ootb.

I don’t recall what the numbers were, but I do remember them flowing more than the 596’s we had been running.
In that application, they did make more power too........ running an RPM intake manifold with an adapter and a 4412 carb.