The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+17x^70+100x^71+24x^72+88x^73+13x^74+4x^75+5x^76+1x^82+1x^84+1x^88+1x^94

The gray image is a code over GF(2) with n=288, k=8 and d=140.
This code was found by Heurico 1.16 in 0.127 seconds.