74Alfa posted:Ok, so I'm doing my research and discovered that this car also has 4V heads. Is this a stock feature of a US-GTS?
Some folks will tell you that US-GTS Panteras were manufactured in 1973 and 1974. That is a misconception. ALL US (North American) GTS Panteras were manufactured after July 1, 1973. They all have chassis numbers greater than 5900. Thus they are ALL 1974 models.
The federal government (US EPA) and California (California ARB) had different tail pipe emissions criteria. Auto makers had to acquire approval from the US EPA to sell cars in the 49 states, and they had to acquire approval from the California ARB to sell cars in California. The California tail pipe emissions standards have always been the more stringent of the two. The federal standards remained unchanged from 1973 to 1974. BUT California's tail pipe emissions standards did change for model year 1974. Ford either refused to modify the 1974 351C 4V engine to achieve smog approval in California for 1974, or it may have been physically impossible for them to achieve approval. So in order to sell 1974 Panteras in California, the Panteras were re-documented as 1973 models, this includes the GTS versions.
To answer your question …. Yes the US-GTS Panteras (which as explained were all 1974 models) were all equipped with 1974 cobra jet engines (Q code engines) having D3ZE head castings (78cc combustion chambers), pistons with 8cc dishes, and about 8:1 mechanical compression. They also had the 1973 exhaust gas recirculation system … which was relatively unique to the Pantera.