The generator matrix

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

generates a code of length 85 over Z8 who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+232x^78+116x^79+427x^80+124x^81+524x^82+164x^83+461x^84+220x^85+386x^86+156x^87+458x^88+148x^89+306x^90+76x^91+143x^92+20x^93+58x^94+29x^96+18x^98+10x^100+12x^102+4x^104+1x^108+1x^112+1x^116

The gray image is a code over GF(2) with n=340, k=12 and d=156.
This code was found by Heurico 1.16 in 17.2 seconds.