Used Diamond W2 Aluminum Heads Yay or Nay?

The clutch I've been looking at after talking to Ram and Mcloed is Rams 10.5 twin disc. Supposedly that's their suggestion for the best compromise between street and strip. It's like 1500 bucks for the clutch and flywheel combo. Still researching clutch options though but I'm certainly not afraid to spend the money on quality. Already destroyed the centerforce dual friction so not wanting a repeat of that.

As for those w2's they'd be going on my 408 stroker so I'd imagine those big ports would be ok due to my engines size?

What are the advantages of milling off the 4150 flange on the strip dominator and welding a dominator flange on it? I had originally hoped i could use a Holley 850 dp that I've got sitting on a shelf.

If I get the w2's it comes with TTI 1 7/8 ceramic coated headers and a ported matched strip dominator intake.

Here's pictures of the rockers and intake. Oh and question, what are the two petcocks on the back of the intake for?
View attachment 1715377893 View attachment 1715377894
Bleeding air out of the system....might have been in an installation where the intake was higher than the radiator filler.