New heads

[HawkX66]

I've been looking to get some extra power out of my 69 Camaro. I'm running a 408 (402 +.030) I R&Rd the heads on it last weekend, but then I calculated what the compression ratio would be when I put it back together. 8.3:1... My new cam wants 9:1 or better so I picked up some 290 heads for $200 last night. I think I did pretty good all things considered. Now the question is, what to do with them? Most of the seats are perfect, but two have a couple of small pits that I'd like to see gone. Should I replace all the seats with hardened seats and re-use my 2.06/1.72 valves or should I go to 2.19 or 2.25 valves? Money is an object... What would I be looking at in machine shop costs for either option? I don't have much for machine shops near me to I'll need to go closer to Detroit I think.
I compared the factory pistons in my born with 350hp 396 to the replacements that are in the 402 I'm playing with. There should be zero clearance issues. The replacement pistons are supposed to be a stock replacement piston, so I figured that was the case.
Thanks for any input.

My virgin born with 396 piston compared to the replacement Silvolite 1445





New Heads 3964290 (H 11 9 & I 23 9 A month newer than mine)









My new cam & springs. Head gasket will be .020.