I have a 2001 4.6 SOHC in my Roadster. My modifications have gone a bit beyond dressing the engine. Last year I switched the intake to the Edelbrock Victor Jr and installed a 4 barrel carb (500 cfm), worked pretty good and reasonable power lower in the power band (I have 3.73 rearend gears, so my car gets over 3000 rpm fairly quick. This weekend we are in the process of installing Trick Flow Heads and Modular Head Shop Stage 2.5 cams. Should get me to around or over 400 hp. I made my own air cleaner for the carb due to limited clearance to the hood. Hopefully the engine will be back in the car next weekend.