looking for a set of heads

I'm looking for a good set of heads for my 416 build up. Since the bottom end parts are easy to buy new ,I figure I'll buy the heads first. This is for my 69 Dart street cruiser. But I do want a set that will support 450 -500 hp. So what do you have for sale out there?

I have a set of T/A U heads, o-ringed, ported, 2.09 int. 1.6 exh., Adj. Rockers w/ Blocks, 1 pc. valves, chromoly retainers, 10 deg. locks, good springs

I have a set of T/A U heads, o-ringed, ported, 2.09 int. 1.6 exh., Adj. Rockers w/ Blocks, 1 pc. valves, chromoly retainers, 10 deg. locks, good springs
Sounds expensive, How much?