Max RPM for my new Exhaust system?

OldVart said
What heads, cam, and valve springs are you running on your combo? Len, I'm with you. I'm way too old to live that close to a sudden sharp pain in the area of my wallet pocket. :)

I'm running a 'Scott Brown' flat solid about .575 lift and 265 degree duration @.050". Pretty unremarkable. Dual springs sent with the cam (read no name). Think Scott said they have 150lbs. seat and 380 open. The heads are econno W2's ported by me.