The generator matrix

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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 71.

Homogenous weight enumerator: w(x)=1x^0+126x^71+135x^72+218x^73+75x^74+122x^75+80x^76+44x^77+38x^78+26x^79+33x^80+54x^81+13x^82+42x^83+5x^84+4x^85+4x^87+1x^88+2x^90+1x^92

The gray image is a code over GF(2) with n=300, k=10 and d=142.
This code was found by Heurico 1.11 in 0.243 seconds.