Are these the correct heads for a 66 Skylark 340 4 Barrel?

I was wondering if anyone knows if these heads for sale on eBay are the correct heads for a 1966 Skylark 340 4 barrel engine. They have the casting number listed.

Here is the link

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7906878040&category=33617

Thank you,
Jerseysky66

 

if you need some correct 66 --340--4bll heads i can come up with some as well. they are on a motor yet and the 4bbl intake is on it as well. no carb anymore though