Match this 500hp/500lb-ft Combo?

The first thing I did was check out what cylinder head there using.

I was going to mention that too. The heads they list seem odd to me. For something with 220 cc port they don't claim to flow very much on the intake (basically the same as eddy claims for the mopar RPM with a 170cc port), then the exhaust flows WAY more than you typically see.

Whats the thoughts on Cam and head specs?
Cam choice- something in the ~235 @ .050 range
Head flow- At least 260cfm intake.

440 source kit and TF 240s
The 470 is good thought that I have considered, but I'm trying to keep it an LA engine around 400" for a couple reasons (weight, transmission choices, accessories, fuel economy, exhaust system, ect)

So this 396 sbc is one benchmark I am trying to beat, the other is a stock 392 Gen III Hemi. (I do not want to go gen III swap since all my other vehicles have them)