I'm afraid not, if you decide to use the special-for-Pantera waterpump pulley that you apparently still have. All other 351C crank pulleys that I've seen are stamped steel rather than cast iron, are some 8" dia which not only will be the wrong ratio to the pump pulley, but you don't have that much clearance down to the water pipes. There may be an oddball Mustang 2 or 3-shive pulley that will fit your 4-bolt harmonic balencer and still be small enough to fit a Pantera, but I don't know which. You'll have to stroll thru your local junkyard, find a vendor with one or get lucky at the San Diego DeTomaso swap-meet held each July. Sorry-