The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+84x^68+284x^69+368x^70+546x^71+618x^72+672x^73+727x^74+620x^75+713x^76+664x^77+622x^78+550x^79+429x^80+414x^81+319x^82+198x^83+144x^84+74x^85+34x^86+42x^87+18x^88+18x^89+8x^90+10x^91+8x^92+2x^93+2x^94+2x^95+1x^100

The gray image is a code over GF(2) with n=304, k=13 and d=136.
This code was found by Heurico 1.16 in 2.83 seconds.