The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  2  1  2  1  1
 0  2  0  0  0  2  6  6  0  0  0  0  2  6  6  2  0  0  0  0  2  6  6  2  0  2  0  6  4  2  4  6  4  2  4  6  4  6  4  2  6  4  4  2  4  6  4  2  4  0  6  4  4  2  2  2  4  4  4  0  6  2  6  6  0  4  0  0  2  2  2  6  0  0  4  0  4  6  6  0
 0  0  2  0  2  2  2  0  4  6  4  6  6  4  6  4  0  2  4  6  2  4  2  4  4  6  0  6  6  0  2  0  6  0  6  4  4  6  0  6  4  2  0  6  6  2  4  4  2  6  2  4  0  2  4  0  4  0  2  2  6  2  0  0  0  0  2  6  2  2  0  4  0  2  2  6  4  0  2  4
 0  0  0  2  2  0  2  2  4  6  6  4  4  6  6  4  4  6  2  0  4  2  6  0  0  0  6  2  2  6  4  4  6  2  0  0  0  0  2  2  4  2  4  6  4  0  2  6  0  2  4  6  0  6  2  4  4  6  6  4  4  2  6  0  0  2  2  0  0  6  2  4  4  6  4  0  0  0  2  4

generates a code of length 80 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+20x^76+42x^77+41x^78+92x^79+129x^80+80x^81+51x^82+36x^83+8x^84+6x^85+3x^86+2x^88+1x^154

The gray image is a code over GF(2) with n=320, k=9 and d=152.
This code was found by Heurico 1.16 in 0.184 seconds.