"I am relatively new to this..............."

Sounds like you'll learn plenty.

As for ifs, the best deal I've seen is on ebay. There's a shop that sells a complete front clip, probably Total Cost Involved, on a "Buy it now" of $2195, freight included. Since TCI is near you maybe you could buy it through him and negotiate a slight discount if you picked it up, or have him arrange a drop ship to your door.

Buying used headers, especially "full size" (as opposed to block huggers) at a swap meet is a poor plan. By the time you clean them up, cut and modify to fit your chassis (unless the guy really wasn't lying to you about what they were built for), you'd be time and $ ahead to buy the right ones new.