The generator matrix

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

generates a code of length 71 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+261x^64+370x^65+637x^66+586x^67+763x^68+660x^69+774x^70+640x^71+643x^72+478x^73+666x^74+392x^75+455x^76+234x^77+281x^78+160x^79+79x^80+48x^81+40x^82+14x^83+6x^84+2x^85+1x^86+1x^90

The gray image is a code over GF(2) with n=284, k=13 and d=128.
This code was found by Heurico 1.11 in 4.02 seconds.