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

generates a code of length 86 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+50x^74+46x^75+124x^76+132x^77+180x^78+264x^79+194x^80+628x^81+226x^82+832x^83+195x^84+1254x^85+209x^86+1046x^87+199x^88+984x^89+161x^90+500x^91+165x^92+268x^93+126x^94+96x^95+100x^96+48x^97+51x^98+28x^99+25x^100+10x^101+9x^102+2x^103+17x^104+4x^105+7x^106+2x^107+3x^108+4x^110+1x^112+1x^130

The gray image is a code over GF(2) with n=344, k=13 and d=148.
This code was found by Heurico 1.16 in 7 seconds.