The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  2  2  4  2  2  0  1  2  1  1  1  0  1  0  0  2  1  4  4  1  1  1  1  1  2  1  2  1  0  1  1  1  2  0  1  2  2  4  1  0  0
 0  2  0  0  0  0  0  0  0  0  4  2  6  2  4  0  2  2  2  2  0  6  6  6  6  6  0  4  2  6  2  4  0  6  2  4  0  4  0  2  2  2  6  2  0  4  4  4  2  4  0  4  2  2  6  0  2  2  2  6  6  0  6  4  4  2  6  4  6  6  0  4  2  4  2  2  4  6  4  2
 0  0  2  0  0  0  0  0  0  0  6  4  2  2  2  2  2  6  4  0  6  4  6  0  2  0  6  6  4  6  6  6  2  0  0  4  6  0  4  2  0  6  2  4  4  0  4  2  4  4  2  0  6  4  6  4  2  6  4  4  2  0  0  6  0  4  4  2  2  6  6  2  6  4  4  0  2  0  4  0
 0  0  0  2  0  0  4  6  2  2  2  6  4  2  2  0  0  6  2  0  4  4  6  2  0  4  2  2  6  4  2  0  0  0  6  6  0  4  0  0  6  2  4  2  2  0  4  2  4  6  6  0  6  4  2  0  0  4  2  2  4  4  0  2  2  0  6  6  2  2  2  6  6  0  6  2  4  0  2  2
 0  0  0  0  2  0  6  6  6  4  0  0  0  0  4  0  2  6  2  6  2  4  0  6  2  6  6  2  4  0  6  2  2  6  4  4  0  4  2  6  0  0  6  4  6  2  6  4  6  0  6  0  6  2  6  6  4  0  2  6  4  0  2  0  4  6  2  4  2  6  2  2  0  0  4  6  2  6  2  2
 0  0  0  0  0  2  2  4  6  2  0  0  0  0  6  2  6  6  4  0  2  2  2  6  0  2  2  4  2  6  0  4  2  2  2  4  4  0  4  6  4  6  0  2  6  6  6  4  2  4  4  2  0  6  6  0  4  6  6  0  4  6  0  4  2  4  0  2  4  0  0  6  6  6  4  4  0  0  2  0

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

Homogenous weight enumerator: w(x)=1x^0+194x^70+4x^71+427x^72+64x^73+580x^74+220x^75+701x^76+296x^77+856x^78+396x^79+869x^80+496x^81+776x^82+324x^83+632x^84+168x^85+438x^86+80x^87+315x^88+160x^90+105x^92+64x^94+19x^96+4x^98+2x^100+1x^112

The gray image is a code over GF(2) with n=320, k=13 and d=140.
This code was found by Heurico 1.16 in 5.86 seconds.