The generator matrix

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

generates a code of length 81 over Z8 who´s minimum homogenous weight is 75.

Homogenous weight enumerator: w(x)=1x^0+252x^75+314x^76+414x^77+346x^78+444x^79+376x^80+378x^81+247x^82+276x^83+204x^84+206x^85+127x^86+120x^87+93x^88+130x^89+30x^90+56x^91+36x^92+20x^93+13x^94+4x^95+4x^97+5x^98

The gray image is a code over GF(2) with n=324, k=12 and d=150.
This code was found by Heurico 1.16 in 0.826 seconds.