ENGINE UNIT NUMBER
Number Shop Manual Name Description/Location(s)
44K2076 Engine Unit Number Top Rear of Engine by Oil Pressure sending unit, etched into block.
Information
44K is the Engine Unit # prefix that identifies the engine type. For this example it means this engine was intended for a 6039, 6329, 6339, 6357, 6367, 6267 with air.
2076 denotes the numerical order in which this engine was built.
A decode card for Prefix codes is located on page 1-2 of the 1963 and 1964 shop manuals.
Decode Info for 1963 390 Engines
Body Styles | Engine Unit No. Prefix |
6039, 6229, 6257, 6267, 6239, 6329, 6339, 6357, 6367, 6389 without air cond |
36X |
6039, 6229, 6257, 6267, 6239, 6329, 6339, 6357, 6367, 6389 with air cond | 36K |
6723, 6733, 6890 without air | 37X |
6723, 6733, 6890 with air | 37K |
Decode Info for 1964 429 Engines
Body Styles | Engine Unit No. Prefix |
6039, 6329, 6339, 6357, 6367, 6267 without air |
44X |
6039, 6329, 6339, 6357, 6367, 6267 with air cond. | 44K |
6229, 6257, 6239 without air | 46X |
6229, 6257, 6239 with air | 46K |
6723, 6733, 6890 without air | 47X |
6723, 6733, 6890 with air | 47K |
Travis J. Hensley Online
Started by Dave Fehrle in 1963/64 Cadillac Specific Discussion. Last reply by Patrick Westphal yesterday. 2 Replies 0 Likes
So I have been having problems with my brake lights. At first I thought it was both sides and turns out it is only the drivers side. Also, I thought the blinker worked and it didn’t and turned out…Continue
Started by Phillip Hill in 1963/64 Cadillac Specific Discussion. Last reply by Dennis P. DiBari on Tuesday. 11 Replies 0 Likes
Hi everyone im currently restoring my my front grill due to some previous clown painting it with silver frost paint and doing a dodgy job I would like to know what parts of the grill are anodised.it…Continue
Started by Nile Bolen in 1963/64 Cadillac Specific Discussion. Last reply by Dennis P. DiBari on Monday. 4 Replies 0 Likes
I checked the Help page and did a search on the site but didn't see any subjects on steering play/slack. Since I had someone complete a front end rebuild (Kanter kit, all the control arm bushings,…Continue
Started by Logan Robb in 1963/64 Cadillac Specific Discussion. Last reply by Michael Vogler on Monday. 12 Replies 0 Likes
Late in the evenings, I wonder about things I will probably never do as I am not that crazy. However, I know someone out there has tried it or wanted it bad enough they have done it. My 64 Fltwd did…Continue
Posted by SK on June 2, 2025 at 2:20pm 2 Comments 0 Likes
Could someone post front and back photos of the 1963 right-hand kick panel with A/C?
My car didn’t come with the original kick panels, so it's a bit of a mystery to me how I should cut the backing board and carpet to fit around the A/C.
Many thanks,
-Samu
Posted by Chase on March 12, 2025 at 2:05pm 14 Comments 1 Like
Hey guys,
I have installed the same Edelbrock carb and have done everything the same as Jason’s carb and intake project. In the spring and summer months the car starts, runs and idles great! In the fall and winter months on a cold start, the car starts awful and wants to die until it warms up. I have to keep my foot on the throttle until it warms up or it will idle just terrible and try to die. Once it’s warm, it runs fantastic! Whats going on here? I was thinking of removing the…
ContinuePosted by Ray Schick on August 22, 2024 at 6:25pm 2 Comments 0 Likes
I bought this seat material thinking that it’s…
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