The generator matrix

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

generates a code of length 40 over Z8 who´s minimum homogenous weight is 34.

Homogenous weight enumerator: w(x)=1x^0+65x^34+200x^35+357x^36+396x^37+428x^38+452x^39+421x^40+450x^41+392x^42+342x^43+243x^44+168x^45+96x^46+24x^47+34x^48+10x^49+11x^50+6x^51

The gray image is a code over GF(2) with n=160, k=12 and d=68.
This code was found by Heurico 1.16 in 0.333 seconds.