We show you how to upgrade your Ford GT40P heads with help from Comp Cams, Lunati, Trick ... The GT40 valve sizes are 1.85/1.54 for the intake and exhaust, while the GT40P went to a smaller 1.46 ...

10 Reasons White Smoke Is Coming From Your Exhaust. Your head gasket is blown. Now you must figure out why. Johnny Hunkins Writer Ryan Lugo Illustrator Apr 05, 2022.

North Carolina–resident John Demolet is the proud owner of this 1989 5.0 convertible. He has added GT40P heads, ported high-output intake, a 70mm throttle-body, a 75mm MAF, and an E303 cam.