Reply to "Engine numbers"

Interesting question AJ, that is indeed a Ford intake manifold. It was not original equipment on the 1970/1971 351C 4V motor installed in your pushbutton car, a cast iron intake was. However, I have read from more than one source that this manifold was indeed installed on some, if not all, pushbutton Panteras. If this was so, it was installed either by Ford or DeTomaso specifically for the engines installed in the pushbutton Panteras. I'll leave it to those more knowledgable about the pushbutton Panteras to verify or deny this manifold was oem.

The part number is actually D1ZX-9425-DA. The other number, 13726548 is the Cleveland motor's firing order.

A little history about aluminum 351C manifolds:

The Cleveland motor was built in 3 distinct states of tune,(1) the small port, 2 barrel carburetor version known as the 351C 2V (2) the large port, 4 barrel carburetor, hydraulic cam version known as the 351C 4V (3) and the large port, 4 barrel carburetor, solid lifter cam version known as the Boss 351 or 351 HO. This last motor is often referred to by Ford enthusiasts as the R code motor, because on a Mustang door tag, the engine code for cars with this motor was "R".

Ford developed 2 aluminum intake manifolds for R code motors. The first was the D1ZX-9425-CA manifold. It was designed for cars sold in the US. It was a spread bore manifold designed for the Autolite 4300D carburetor. This is the manifold you'll find on a 1971 Boss Mustang, or a 1972 Mustang with the 351 HO motor. The other manifold was the one installed on your Pantera, D1ZX-9425-DA. It was designed for R code motors destined for Australia. It was a "square bore" manifold designed for a Holley 780 cfm carb. The "DA" manifold was sold in the US over the counter as part of Ford's OHO (off highway) parts program.

The R code motors were shipped to Australia with the "DA" manifold & 780 Holley, and installed in the Australian Ford 1971 Falcon XY GT-HO phase III, which is perhaps Australia's most famous muscle car.

cowboy from hell