You're leaving yourself a pretty narrow window to wriggle thru.
In 2004, the EPA mandated addition of emission control devices that really buggered up the anvil.
If you find one of even more recent vintage going for $1-2K, chances are because it's on it's last legs, and repairs'll run higher than it's worth doing.
You'd be better served, pun intended, in the long run to find yourself a 2003 or earlier.
Those who say that it cannot be done should not interrupt the people doing it.