70 chevelle big block AC bracket

[jl8z28]

Does any one know what a Big block 70 Chevelle AC bracket part number 3969912 would be worth thanks http://www.yenko.net/ubbthreads/pics/usergals/2016/12/full-1102-54488-imag1159.jpg
http://www.yenko.net/ubbthreads/pics/usergals/2016/12/full-1102-54489-imag1160.jpg