The heads you posted are a little overkill for your project but will work. If you go that route you'll probably need a higher stall though, maybe a 2500 or a little more. With those heads, a good intake and headers, a decent carb and a cam with 220ish duration and .500"ish lift you'll probably be closer to 450hp than 350hp. If you stick with a stock intake you can probably knock it down to 370ish hp.
If you really only want 350hp then you can use a pair of heads out of the junk yard, maybe even the ones you have.