Re: doing head gasket on 4.7 help
You can drive it fine without a tune on PNP heads. You haven't changed the cam which is where the issue would come from. You'll want to tune to get full benefit but it wont hurt you. You may want to stay out of high RPM spirited driving until you can tune it but general driving will be fine.
Supercharged 4.7L HO. If you would like to know more just ask.