The generator matrix

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

generates a code of length 86 over Z8 who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+54x^78+130x^79+215x^80+330x^81+291x^82+294x^83+342x^84+312x^85+334x^86+298x^87+291x^88+266x^89+267x^90+262x^91+156x^92+98x^93+47x^94+30x^95+12x^96+6x^97+20x^98+8x^99+4x^100+10x^101+7x^102+2x^103+2x^105+2x^106+2x^108+2x^110+1x^120

The gray image is a code over GF(2) with n=344, k=12 and d=156.
This code was found by Heurico 1.16 in 1.25 seconds.