Others more qualified will make recommendations as to the cylinder heads, but for what little money you can pay for a 440 block, I would without a doubt find another. Ask yourself this, is it cheaper to absord spending $300 to $600 max on a 440 block, or take a hit on the value of the car minus the matching numbers engine.

As far as cylinder heads, are you asking about factory head choices and/or the choice of aluminum heads, and is it worth the money to purchase aluminum heads for a mild engine with occasional weekend drag racing? Im asking the same thing. My car will be a show car puppy and occasional driver, and am considering the 6 pack option over aluminum heads as the 6 pack is always a crowd pleaser.