The generator matrix

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

generates a code of length 72 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+228x^70+155x^72+72x^74+52x^78+2x^80+1x^88+1x^112

The gray image is a code over GF(2) with n=288, k=9 and d=140.
This code was found by Heurico 1.16 in 63.3 seconds.