[olddog]

I have Edel performer RPM heads on a 347 (5.0 stroker). I'm running .555/.575 lift and 236/242 duration. I think the LSA is 106 or 108 - I'd have to find the cam card to be sure. It depends on what you like, but vacuum at idle is low and idle is a bit knarly. I feel these heads limit the engine. The heads have been port matched to the gaskets.

Power is all about breathing. I would put better heads on the 408. Look at Keith Craft's web site and check out his head section. For about the same money you can step up to better heads.

If you like good low rpm torque, your cam will work. I would go higher on the lift, to take advantage of the heads. Another 6 deg on the duration would help, and still give good manors.

Just one more opinion.