The stealth heads can flow as well as the Eddys. So if yours are pocket ported there probably close to 300 or so. Thats plenty good enough for what you want to do ,IMO.

And Yes , your current combo works darn great.

My Old 509 combo was at 10.78 comp too, and ran 10.47,s @ 3000# It would of been faster with a 5100 vert vs a 4100 vert. 10.30,s or so I bet.