The generator matrix

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

generates a code of length 78 over Z8 who´s minimum homogenous weight is 75.

Homogenous weight enumerator: w(x)=1x^0+46x^75+66x^76+112x^77+122x^78+60x^79+60x^80+4x^82+38x^83+1x^88+1x^98+1x^122

The gray image is a code over GF(2) with n=312, k=9 and d=150.
This code was found by Heurico 1.16 in 39.3 seconds.