Any recommendations for building a '73 340?

I missed the 2-3 grand budget part. Change hobbies. Tiddly Winks is much cheaper. I know that was smartass, but consider this.

GOOD QUALITY machine work to get a good foundation to build with is going to take HALF your budget very quickly. POOF. GONE. Not even having bought any parts. Then comes headers that will fit well. Consider another thousand, POOF. GONE. Then, whichever way you go with heads is a lot of money. Your HP goal won't be met with unported heads, IMO. That's why I recommended aluminum heads. By the time you get the iron heads RIGHT in terms of guide, seat, valve and port work, there's the cost for aluminum heads. It's also my opinion skipping 2.02 valves at this power level is ludicrous. See where I'm goin here? I think you need to back up and punt with your budget plan, or back up and punt with your power output plan. Otherwise your outcome will not be what you want.