sixtysix

Just picked up a 289..If I am reading the numbers correctly ........ 6M12.....I think this means 1966 december 12th

C6 AE 6015 -0...I think this means C (1960's) 6 (1966) AE (Galaxie) 6015 (289) 0 (not sure)

The part I am confused with is the AE...does this mean Galaxie?
What type of car did this engine come from?


I copied this froma web site

HOW TO DECODE YOUR MUSTANG ENGINE BLOCK FOR A 1965, 1966, 1967, 1968, 1969 AND 1970 MUSTANG
Where to find the engine block numbers: look toward the back of the engine block on the right hand side, above the starter. You will find the casting number at this location.

For the purpose of explaining each individual letter and number, we have created a sample engine block number and date code. Then we have broken these numbers down, explaining what each number and letter represent.


OUR SAMPLE ENGINE BLOCK NUMBER: "C5AE-6015-E 7C20"
C - Designates the decade that the engine block was made.
C = 1960's; D = 1970's; E = 1980's and so on
5 - Designates the particular year that the engine block was made.
5 = 1965; 6 = 1966; 7 = 1967; 8 = 1968; 9 = 1969; 0 = 1970
It is important to note: a more accurate date of when the engine was made is reflected in the date code which follows the casting number. Casting numbers were sometimes a year or two ahead of the block's date of manufacture (sometimes they were even behind the date of manufacture).

This is evident, for example, in a 1964 1/2 Mustang with a 289. The casting number "C5AE-6015-E" and the date code "4D17" show differing years of the engine block's manufacture date. One might think that "C5" indicates the engine block was made in 1965. However, according to the date code, it was actually manufactured in 1964. Always look to the date code for the correct manufacture date.

A = Designates the vehicle the engine was designed for.

A = Galaxie; D = Falcon; F = made outside the USA; G = Comet; J = Industrial/Marine; M = Mercury; O = Fairlane; P = Autolite or Motorcraft; R = Rotunda; S = Thunderbird; T = Truck; V = Lincoln; Z = Mustang

E = an engineering number used by Ford
(The 289 was originally designed for the Ford Galaxie and the letters AE stayed on the engine block number even after other models were added to the lineup)

6015 = Designates an engineering number used by Ford.
"6015" meant "289 Engine Block"

E = Designates the location that the engine block was made.
Engine blocks were made in Detroit, Michigan and Windsor, Canada



[/align]The next set of numbers, "7C20", indicate the date code. In this example, even though the casting number reads "C5", it doesn't mean that the engine was made in 1965. You would need to look at this date code to see when it was made, which in this case is 1967.

Breaking the "7C20" date code down:

7 = designates the particular year that the engine block was made (remember to look at this date code for an accurate reading of the engine block's manufacture date)

5 = 1965; 6 = 1966; 7 = 1967; 8 = 1968; 9 = 1969; 0 = 1970

C = designates the month that the engine block was made

A = January; B = February; C = March; D = April; E = May; F = June; G = July; H = August; J = September; K = October; L = November; M = December
(the alphabet letter "I" was not used in the sequence)
20 = Designates