A frequently asked question

Did Ford produce 1968 Mustangs with Q-code 428 Police Interceptor engines?

Kevin Marti confirms that the records his company has licensed from Ford do not include any 1968 Mustangs equipped with a "Q" engine code. The VINs I've seen for alleged Q-code cars have all turned out to be cars that originally left the factory as C-code (289-2v) cars, meaning someone modified the cars and altered the VIN - and that's not legal.

Were 428 Super Cobra Jets only available in 1969 and 1970?

The 428 Super Cobra Jet engine was first available in 1969, exclusively available when ordering either of the optional 3.91:1 or 4.30:1 rear end gear ratios. The Super Cobra Jet included a number of reciprocating assembly changes to stand up to the rigors of drag racing, including beefy capscrew connecting rods, cast pistons, and a crankshaft, flywheel or flexplate, and harmonic balancer distinct from the standard 428 Cobra Jet.

Do Super Cobra Jet blocks have higher nickel content than Cobra Jet blocks?

Finding the word "Super" stamped on some Cobra Jet blocks has led some people to believe that the block is a high nodular iron casting or is somehow otherwise stronger than other 428 Cobra Jet blocks. According to several sources all 428 Cobra Jet, 428 Super Cobra Jet, and 428 Police Interceptor engines were assembled on the same production line and this stamping helped identify engines whose bottom ends required Super Cobra Jet components.

Were all 428 Cobra Jet Mustangs equipped with automatic choke carburetors?

While it's true that most 428 CJ carburetors used an automatic choke, the 1970 carburetors used a manual, cable-activated choke. These carbs can be identified by casting numbers D0ZF-9510-AA (4-speed without air conditioning), D0ZF-9510-AB (automatic without air conditioning), D0ZF-9510-AC (4-speed with air conditioning), and D0ZF-9510-AD (automatic with air conditioning).

Did Ford produce any 1970 428 Cobra Jet Mustangs with a 4-speed transmission and air conditioning?

According to Ford production records researched by Kevin Marti, Ford produced eleven 1970 Mach 1 Mustangs with a 428 CJ engine, 4-speed transmission, and air conditioning. All were produced fairly late in the model year, with eight produced at Dearborn, one produced at San Jose, and two produced at Metuchen. Five of the cars were Q codes, and six were R codes. All were equipped with 3.25:1 rear gears; two were limited slip (code "R") and nine were open (code "9"), and only one was equipped with a factory tachometer.