Link Repairman on the job.
Try this:
http://www.jegs.com/photos/jegskaase.html
My concern would be how these heads would work "on the street". The beauty of the AFR heads is that they work well from a low rpm right into the ultra high rpm ranges. Making them very street friendly and yet GREAT performers at the high rpm! The "port" size and runner length is the key to good "over all" performance.
The old Mustang BOSS-302's used the MASSIVE 351-C Cleveland heads. Oh yeah, they FLOWED some serious air and made BIG horse power all right, they also blew up a LOT of motors from the extreme rpm required to gain that horse power. The lower rpm range was worthless! The heads were retired after one season.
This same principle of "induction" also applies to cam and intake selection. A single plane intake will flow more air, but it will be hell to drive on the street! A "radical" cam will work well at HIGH rpm, which is great if your "drag racing".
Choose wisely grass hopper........
Ernie