I was suggesting that the OP join "us", with "us" being me and you, and the other fellas here on FSC that like small cammed engines.
The heads on my old muscle car are better than 85%, and I run a single pattern lazy lobe old school flat tappet cam, and that engine pulls as hard at 2500 as it does at 6500. It is all in the heads. Always will be. I agree, absolutely, that the cam needs to match the heads. We know where vortec castings stop making power, and we know where the OP wants to stop making power. That is why we're telling him to build grunt engine.