You're right about the valve-train setup. I read the article how SAM did a 414 buildup a few years ago using the same heads you mention. The combo worked out great.

But here's where I differ: Where SAM opened up the Intake Ports from 176 cc to 190cc, I look to have at least 200cc for my 422. The factory and the Eddy replacement street heads all share the same (cursed) pushrod-pinch that hinders CSA. I don't want that even if it can be sleeved with brass tubes. If I'm going to spend money on NEW aluminum castings, they're going to be better than what the factory offered.

I'm also looking at the Eddy Victor and Brodix B1BA Heads as a comparison.

Thanks for the nice pic too.