JR is the code for a 63 401 2bbl engine. I think this was the 9 to 1 compression engine. 4J4014442 decodes as: 4 for 4 series Lesabre, J for 1963, 4 for the Kansas City, Kansas assembly plant, and 014442 for the # of the car in the make.
Production Code on my motor is JR466, Serial # is 4J40 I4442. Motor has 2bbl Rochester. This motor is in a 60 Lesabre Convert, which I just purchased. I think this motor is a 63 401? Can anyone verify?
JR is the code for a 63 401 2bbl engine. I think this was the 9 to 1 compression engine. 4J4014442 decodes as: 4 for 4 series Lesabre, J for 1963, 4 for the Kansas City, Kansas assembly plant, and 014442 for the # of the car in the make.
Steve B.
67 GS 525 Buick Stage IV
66 GS Convertible
65 GS HT
63 Riv
02 Subaru WRX Turbo
03 Ford Cobra Convertible (Factory Supercharged)
Thanks so much for your help---and I thought I had a 364!
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