If you had a bucket full of stock parts and wanted to build a Hot Lil engine and HAD to stick with the factory Bore, Stroke, Heads and Intake what would you do?
I throw the intake in there as well because I have seen the inside of some of the older Mustang 4.6L Cobra Intakes and they look quite similar BUT with some die-grinder and cutting wheel work have been made to actually be decent performers.
Change anything else you like and modify those said pieces anyway you like!!
Let's see some ideas!!