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

generates a code of length 86 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+243x^76+390x^78+68x^79+546x^80+176x^81+744x^82+332x^83+843x^84+456x^85+858x^86+420x^87+828x^88+384x^89+632x^90+132x^91+386x^92+72x^93+244x^94+8x^95+187x^96+144x^98+56x^100+24x^102+13x^104+4x^106+1x^128

The gray image is a code over GF(2) with n=344, k=13 and d=152.
This code was found by Heurico 1.16 in 35.7 seconds.