Need help decoding

[bigowhiteboy]

I have a 1965 galaxie 500xl and have been trying to decode the warranty code with no luck. I've searched this forum and the web but can't seem to find any info. I was hoping someone here could help. The code is as follows;
63C 5 77 21G 72 1 4
I was able to decode the vin# which is 5J68X189xxx. According to what I found the car had a 352, but I was under the impression it had a 390, because I pulled it and put in a 428cj which bolted right in place. Am I wrong or would that not have been possible if it were indeed a 352? Any info would be great thanks.

[bjlordemann]

x in the vin in 65 equals 352 4v. 63c is body #;5 color; 77 = trim; 21g date code; 72 sales district; 1 axle [3.00:1] 4 trans [cruise-o-matic]. 352 and 428 are made from same block so everything should "just bolt up". hope this helps

[bigowhiteboy]

Yes that does help, so does that mean it's an open rear end and is it a 9"?

[bjlordemann]

my info only gives the ratio ; if it were a locker it would have a letter code for 65. unless its been changed i would say its 99% sure a 9 inch . it should have a small aluminium tag on one of the bolts that can be decoded to tell for sure. good luck