The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  1  1  4  2  4  2  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  4  1  1  1
 0  1  3  6  1  1  3  0  1  6  5  1  0  3  1  6  5  1  0  3  1  6  1  1  0  3  1  6  5  1  0  3  1  6  1  1  0  3  6  5  1  1  1  1  4  2  7  5  4  2  4  2  4  2  4  2  0  6  4  2  4  2  4  2  7  5  7  5  7  1  7  7  3  1  7  5  0  1  1  3
 0  0  4  0  0  0  0  4  4  4  4  4  0  0  0  4  4  4  4  4  4  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  0  0  0  0  4  4  0  0  4  4  4  4  4  4  4  0  0  0  4  0  4  4  0  4  0  4  0  0  4  0  4  0  0  4  4  0  4  4  0  4  4  4  0  0
 0  0  0  4  0  4  4  4  4  0  4  0  0  0  4  0  0  4  4  4  0  4  4  0  4  0  0  0  4  4  0  0  0  4  4  4  4  4  0  0  4  0  4  0  0  4  4  0  0  0  4  4  4  0  4  0  0  4  4  0  0  4  0  4  0  0  0  4  4  4  4  0  4  0  4  4  0  0  4  0
 0  0  0  0  4  0  4  4  4  4  0  4  4  0  4  0  4  0  0  4  0  4  0  4  4  4  4  4  4  4  4  4  4  4  4  4  0  0  0  0  0  0  0  0  0  0  0  0  4  0  4  0  4  4  0  0  0  0  0  4  4  4  0  4  0  4  4  0  4  0  4  0  0  4  0  4  0  0  4  4

generates a code of length 80 over Z8 who´s minimum homogenous weight is 77.

Homogenous weight enumerator: w(x)=1x^0+48x^77+30x^78+176x^79+62x^80+112x^81+32x^82+16x^83+32x^85+1x^94+1x^96+1x^126

The gray image is a code over GF(2) with n=320, k=9 and d=154.
This code was found by Heurico 1.16 in 52.7 seconds.