The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+116x^70+500x^71+736x^72+1332x^73+1227x^74+2098x^75+1569x^76+2656x^77+2052x^78+3216x^79+1977x^80+3266x^81+2109x^82+2582x^83+1556x^84+2040x^85+1111x^86+1098x^87+534x^88+452x^89+222x^90+162x^91+87x^92+42x^93+9x^94+6x^95+4x^96+2x^97+2x^98+2x^99+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 1.16 in 42 seconds.