Trick flow heads good deal?

I saw someone was selling a set of ford 302 trick flow twisted wedge heads 170cc
for 900$, 1000$ with rockers.

Added (1). the dude said they where for a foxbody, but i've read and asked questions and people say stock foxbody 5.0 heads will fit on my 1973 mustang. Id assume these would also fit but i want to make sure. Will they?

I think that's a good deal. Make sure they won't need different pistons to clear the valves.