BLOCK CODES:
A - January
B - February
C - March
D - April
E - May
F - June
G - July
H - August
I - September
J - October
K - November
L - December
CASTING NUMBERS:
3970010 - 350
3970014 - 350
3963512 - 454
ENGINE SUFFIX CODE:
CKW - 350ci, 200hp (Rochester Quadrajet & 4-Speed Manual Transmission)
CDH - 350ci, 200hp (Rochester Quadrajet, NB2 & 4-Speed Manual Transmission)
CKX - 350ci, 200hp (Rochester Quadrajet & THM Automatic Transmission)
CDJ - 350ci, 200hp (Rochester Quadrajet, NB2 & THM Automatic Transmission)
CKY - 350ci, 255hp (Holley 1x4 Carb, Mechanical Lifters, 4-Speed Manual Transmission)
CRT - 350ci, 255hp (Holley 1x4 Carb, Mechanical Lifters, K19, 4-Speed Manual Transmission)
CKZ - 350ci, 255hp (Performance Package, LT1 Eng, M22 4-Speed Manual Transmission)
CPH - 454ci, 270hp (Rochester Quadrajet, Hydraulic Lifters, 4-Speed Manual Transmission)
CPJ - 454ci, 270hp (Rochester Quadrajet, Hydraulic Lifters, THM Automatic Transmission)
CSR - 454ci, 270hp (Rochester Quadrajet, Hydraulic Lifters, K19, 4-Speed Transmission)
CSS - 454ci, 270hp (Rochester Quadrajet, Hydraulic Lifters, K19, THM Auto Transmission)