The generator matrix

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

generates a code of length 71 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+65x^68+84x^69+122x^70+82x^71+44x^72+40x^73+20x^74+10x^75+16x^76+8x^77+8x^78+8x^80+1x^86+1x^88+1x^90+1x^96

The gray image is a code over GF(2) with n=284, k=9 and d=136.
This code was found by Heurico 1.11 in 0.11 seconds.