Sean Hyland is overpriced. Shop around and you can find better deals than that. On the avg I've seen the DOHC for around $6000. Check salvage yards (though the most likely engine would not be the 99 but the 96-98), too. There's one here that carries late model motors like LT1s, etc. Check with Mustang Parts Specialties and see if they have or know where to get one. It's going to take some shopping. Pick up some mustang magazines and check ads in them, too. Good luck finding a 99 DOHC. You'd have much better luck getting a 96-98 DOHC and playin' with it.
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FOR SALE: 1996 Mustang GTS: 5-speed, K&N, removed air silencer, 3.73s, 49,000 miles. $11,000.
http://www.mustangworks.com/cgi-bin/moi-display.cgi?388
[This message has been edited by 96GTS (edited 11-03-2000).]