The generator matrix

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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+108x^69+144x^70+264x^71+39x^72+312x^73+156x^74+256x^75+232x^77+76x^78+216x^79+18x^80+104x^81+44x^82+32x^83+12x^85+20x^86+4x^88+8x^90+1x^96+1x^104

The gray image is a code over GF(2) with n=300, k=11 and d=138.
This code was found by Heurico 1.16 in 0.423 seconds.