Kaylah, I know that there were about 72000 mach 1's in 69. I all so read that there were 13000 or so mustangs in 69 with 428's. Do you know the productions numbers for 69 mustang mach1's with 428 super cobra jets. It been explained to me the there were 428 cj and super cj the difference being one with no ram air and ones with ram air, different crank and rods, but advertised the same power. Please correct me if im mistaking.