440 Build Suggestions

Hello all,
I'm pretty new to this site and was looking for some build suggestions on my new 440, I've always been around Mopar engines and working on them but have never really gone after bigger horsepower so I was looking to those with more experience than myself. I've been doing a lot of research and have come up with a generally build of what I want to do.

I've got a 440 block that I'm gonna have bored 0.030 over, stock crank and rods
Kieth Black Pistons with Trickflow Powerport 240 heads, should be around 10.5:1
Comp cam XE285HL, 241/247 @0.5, .545/.545 Lift
APR head bolts
3000 stall with 323 gears, might upgrade to 355 later, rebuild 727 trans with shift kit
1 7/8 headers
One of the questions I had was about the valve train, I know it would be optimal to upgrade to more modern components, but I was wondering how the stock would hold up? I've inspected them and they seem to be in good condition. Other wise I was looking for an estimated horsepower, I guessed based on other builds around 575hp, otherwise was looking for any suggestions for improvement. Thanks