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Chevy Engine Module Number

Are you trying to identify a 350 chevy motor? What is a module number? The engine model number is on a pad in front of the passenger side head. The block casting number is on the flange where the transmission bolts to. Go to this website once you have your numbers. Small Block Chevy Engine Block casting and code identification
 

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Chevy block casting numbers

block # 3970010 head 3870126 and k11 12 cnu ? don't know what that is thanks
K= St. Catherines, Ontario, McKinnon Industries, Canada.
11=November, 12= day of month. CNM= 1970 350 powerglide, 250hp, 2B carb, A= Chevelle, F= Camaro, X= Nova/ Belair/ Kingswood. 3970010 = 350 2/4 bolt mains, 1969-1979. 3970126 = 327,350, 1967-71, 1.94 intake 1.5 exhaust, The number 3870126 does not exist.
 
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