Alright Ford gear heads just another quick question?
Dude you cant do it! If you have a 4.6 SOHC mill you cant just bolt on DOHC heads...Single Overhead Cam is a totally different animal than its Double Overhead Cam brethren. DOHC is fairly exotic and primarily used in high rev, high performance applications. A DOHC V8 motor has a total of 4 camshafts, one for intake valves and one for exhaust valves on each bank. Your SOHC mill has a total of 2 camshafts, one on each bank operating both the intake and the exhaust valves.