opinions welcome on build.

I was just trying to spur on interesting and though provoking discussion on efficiency and FAST engines are not really the pinnacle of that.

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In a series like FAST, there is no award for having your engine be “efficient”.

It’s a “run what ya brung, and hope you brung enough” class.
All you’re trying to do is make more power.
If you added 50 cubes, and that only netted 20 additional hp....... as long as it didn’t come with at the expense of a bunch of extra weight....... it’s still a win.

The point of my original example was........ I added cubes, and tweaked the cam to an existing combo......... one that’s pretty severely hindered on both the intake and exhaust.
And it made more tq and more hp....... and the car went faster.

I really don’t see any reason why the same approach wouldn’t apply for similar type street/strip builds.
Is there a chance the efficiency might go down?
Sure.

But I’ve never had a customer ask me to build to a hp/ci figure.

It’s just, I want *** hp...... how do I get there?

As with anything, there’s more than one way to get there.
The OP was asking for opinions....... mine is..... don’t fear the stroke.

Oh, and if both the 427 and 402 builds were starting from scratch, there wouldn’t be any additional cost for the extra cubes.