Originally Posted By: dnewton3
I don't believe the panther cars (CV, GM) ever got a three valve engine. They all got 2-v engines, with the very rare exception of the Maruaders, which got 4-valve engines from the Cobra a few years back.
The three valve engines are used in the trucks. At times, they are an "upgrade" (such as in the F-150, depending upon trim level and such). But they are also standard issue, at times, such as the newer Super Duty trucks. It really varies from year to year, and vehicle to vehicle.
But the 'Vic and 'Marquis never got 3-v; even the CVPIs get a two-valve engine.
And just for reference, the 6.8L Triton was made in 2v, and now 3v, but the 3v does NOT have the VVT. I believe it's because the V-10 has an extra balance shaft on the top of the head (right side, as facing the truck, as I recall) to balance the V-10 imperfect firing order. Because it's up in the head, there is no room for the VVT extra hardware. So, you could get a 3v 6.8L, but no VVT.
Minor Correction: From '05 all truck V8s are 3V, whether 4.6L or 5.4L. The '04 "Heritage" F-150 models (previous body style leftovers) still had 2V engines, as did the Super Duty trucks, Excursions, Expeditions and vans. The 3V engines appear to be a mixed bag in '04, with the F-150 having the 5.4L version but not the 4.6L. I just looked through my '04 and '05 Ford Data books and service manuals to glean this. All these are early MY books, so the 3V engine may have begun to trickle in by the end of '04. You are correct about the V10 being 3V from '05 on, but without VCT.