GM Engine Casting Numbers (Sorted by Make/CID) Chevrolet Casting Numbers Number Make Year CID 839910 Chevrolet 42-51 216 389770 Chevrolet 42-51 216 839770 Chevrolet 42-53 216 3835253 Chevrolet 42-53 216 3835794 Chevrolet 42-53 216 3835497 Chevrolet 42-53 216 3835849 Chevrolet 42-53 216 38...
2. Engine Block All Gen IV engine blocks have AFM towers and oil passages cast in. However, they are only functional on engines that used AFM. (Image/Summit Racing) 3. Lifters AFM engines use special lifters for cylinders 1, 4, 6, and 7. They are taller and have special o...