[Excaliber]

Impossible to mistake a 4.6 for a 5.0. Totally different motors, if the junk yard dog says it's a 5.0 you can bank on thats what it is!

Truck and GT engine virtually the same. Cam will be for more low end grunt in the truck application. Thats about it.

I was under the impression that some GT-40 heads were indeed "iron". Get the right manifold, injectors, throttle body etc. to really take advantage of the additional flow. Little to be gained if you don't work the whole "breathing" package thing.

Hot cam? Will your manifold be able to flow as much air as the cam will? Will the exhaust be able to flow enough air to match the heads? Will the 19lb (orange top) injectors provide enough fuel? Will the computer "timing and fuel" mapping be correct for the additional air movement (in and out)? Will the Mass air flow sensor now become the "weak link" in the chain?

Oh what the hell,,,, get a good cam and bolt on the GT-40 heads and it WILL be better. Just not as good as it COULD be!