There were early and late Boss 429 street intake manifolds.
Early had the cylinder # cast on a raised boss over each port.
Late had only the center 4 #'s raised and cast.
Somewhere in production the mold got dirty and the C9AE-9425-D will look like every other number was ground off. Less desirable.
Should have original Ford blue paint on it and the brass fitting for the brake booster, brass fitting for pvc, vacuum tree, temp sender.
Are the threaded holes in good shape, especially around the rear heat riser tube? Can you send pics to
rapidmustang@aol.com or to
703-929-4955. Thanks, Bernie