The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+228x^69+292x^70+426x^71+376x^72+434x^73+340x^74+384x^75+280x^76+274x^77+181x^78+228x^79+161x^80+194x^81+90x^82+64x^83+37x^84+42x^85+21x^86+18x^87+8x^88+12x^89+4x^90+1x^92

The gray image is a code over GF(2) with n=300, k=12 and d=138.
This code was found by Heurico 1.11 in 0.491 seconds.