20 x 12 will they fit?

[Leoraf]

Can I fit 20 x 12 wheels from a newer ZO6 vette in the rear of my 1962 Impala without mods? I think 12" is too wide, all I've seen is 20 x 10 or 22 x 9.5 used on my Impala. I can get a great deal on these 3pc wheels off of the ZO6 but will they fit. HELP!