Murf, Those heads wouldn't scare me a bit on a 400. The intake runner size isn't all that big. Technically it's SBC size. When you consider the 100's of thousands of engines built with this runner size that are much smaller than a 400 and how well they run, both aftermarket and OEM stuff, there is no reason to be hesitant. If a 400 is what you want to build, I'd go for it.
If a stroker is in the budget, I'd certainly go in that direction. I like cubes and what that brings to the table.
Either way sounds like a cool project.
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