Decoding a Rochester 2GV (2BBL)

Hi , could you help me to decode the numbers on my Rochester 2GV on my car . I have no idea about the 2nd line


1st Line
7028140
70 = Rochester
28 = 1968
1 = ??? (Canadian car)
4 = Buick
0 = Automatic trans (even #)

2nd Line
A87KE
A = (automatic??)
8 = (1968??)
7 = (??)
KE = (plant??)

 

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