I have a set that have been ported and polished by "Power by Ford". Chambers are 78CC. They have screw in studs and guide plates. Repalced them with a set of TFS heads a year or two ago. Been meaning to post them for sale.
They should be freshened up - however they were not used much.
$250.00 is the average price around here too. I'd be willing to do $300.00, shipping included, if you're not on some remote rural route that costs big $$$ to ship to.around here a decent price is about 250 for a core set of heads carl, but being you're in colorado 150 bucks would be about it on those core heads time shipping is involved and stuff thats really what we wanting to do is just a core set we can piddle with and do a little port work and stuff on