The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+246x^69+248x^70+404x^71+359x^72+468x^73+402x^74+368x^75+294x^76+292x^77+206x^78+204x^79+144x^80+132x^81+87x^82+108x^83+16x^84+38x^85+28x^86+24x^87+2x^88+8x^89+5x^90+12x^91

The gray image is a code over GF(2) with n=300, k=12 and d=138.
This code was found by Heurico 1.16 in 0.691 seconds.