The generator matrix

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

generates a code of length 81 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+64x^70+240x^71+510x^72+710x^73+978x^74+1294x^75+1612x^76+1932x^77+2360x^78+2638x^79+2715x^80+2826x^81+2696x^82+2632x^83+2346x^84+1992x^85+1650x^86+1218x^87+872x^88+560x^89+349x^90+204x^91+146x^92+98x^93+45x^94+24x^95+18x^96+8x^97+17x^98+6x^99+4x^100+2x^101+1x^102

The gray image is a code over GF(2) with n=324, k=15 and d=140.
This code was found by Heurico 1.16 in 49.6 seconds.