340 to 416 stroker build need advice

Wow, thanks for all the info fellas. Using forums has always been my way to hear both sides of the story rather than just the guy who's selling me something, very useful. I do believe in the knowledge of the guys at Hughes and am willing to buy their products, but I want to be able to exactly what I'm talking about when we are on the phone throwing numbers and money around like it's a Christmas wish list, especially when I'm going to spend upwards of $8000 on this build-up. I don't want to feel like I can't sit down once it's all said and done:bootysha:. That being said I do have some more questions.

Cranks:
Hughes says Eagle cranks are no good? They also say Scat cast is good to 600hp? I guess bottom line is what are some true cast and forged crank hp ratings?

Rods
H or I beams?

Anyone heard of www.gofaststuff.com? Prices are low and I've seen them on Ebay. All they carry is Eagle cranks.

CAMS
Racer brown vs. Hughes? Solid or Hydraulic? Biggest cam with 91 octane?

CARB
750 or 825cfm mighty demon or speed demon or?

CLutch
Who makes a killer clutch/ flywheel setup that will handle 550hp without killing my left leg? Centerforce, Hays, McLeod? I've used Centerforce Dual-Frictions in the past and liked em.

Lastly, now I'm really on the fence about the stud girdle. ANy other opinions? Oh, and the block I have is a standard bore that was honed by the previous owner and is in excellent shape. Are there stock 4.040" bore pistons out there that will work with a stroker kit for 410CI?
Side note: I also have some bare x heads that are nice. I bought them thinking that they were the way to go. Guess I was wrong. Any experience with fully ported x heads? Is it worth the $? Thanks