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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+158x^69+142x^70+410x^71+145x^72+506x^73+212x^74+556x^75+108x^76+484x^77+170x^78+442x^79+114x^80+266x^81+78x^82+160x^83+4x^84+52x^85+28x^86+20x^87+10x^88+4x^89+2x^90+10x^91+2x^93+4x^94+1x^96+4x^98+2x^99+1x^104

The gray image is a code over GF(2) with n=304, k=12 and d=138.
This code was found by Heurico 1.16 in 98.6 seconds.