The generator matrix

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

generates a code of length 80 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+112x^70+406x^71+804x^72+1110x^73+1435x^74+1794x^75+2124x^76+2250x^77+2415x^78+2798x^79+2691x^80+2490x^81+2491x^82+2366x^83+2130x^84+1682x^85+1211x^86+960x^87+586x^88+350x^89+286x^90+144x^91+72x^92+18x^93+18x^94+12x^95+6x^96+2x^97+2x^100+2x^101

The gray image is a code over GF(2) with n=320, k=15 and d=140.
This code was found by Heurico 1.11 in 18.7 seconds.