The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  0  2  0  2  0  2  4  2  2  2  2  2  2  2  0  2  4  2  4  2  4  4  4  4  0  2  4  2  4  4  4  0  4  1
 0  2  0  6  0  6  0  2  0  6  0  2  0  6  0  2  4  6  4  2  4  6  4  2  4  6  4  2  4  6  4  2  6  2  6  2  6  2  2  2  0  0  0  4  4  4  6  2  2  2  2  2  2  2  0  0  0  0  0  4  4  4  4  4  4  0  0
 0  0  4  0  0  0  4  0  0  4  0  4  4  4  4  4  4  0  4  0  4  0  4  0  0  4  0  4  0  4  0  4  0  0  0  0  4  4  4  4  0  4  4  4  4  0  4  4  4  0  0  4  0  0  0  0  4  4  0  4  0  4  0  4  0  0  0
 0  0  0  4  0  0  0  4  4  4  4  4  4  0  4  0  0  0  0  0  4  4  4  4  4  4  4  4  0  0  0  0  0  0  4  4  4  4  0  0  4  4  0  0  4  4  0  0  4  4  4  4  0  0  0  4  4  0  0  0  0  4  4  0  0  0  0
 0  0  0  0  4  4  4  4  4  0  0  4  0  4  4  0  0  0  4  4  4  4  0  0  0  4  4  0  4  0  0  4  0  4  4  0  0  4  4  0  4  0  4  4  0  4  4  0  0  0  4  4  0  4  4  0  4  0  0  0  0  4  0  4  4  0  0

generates a code of length 67 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+15x^64+62x^65+32x^66+96x^67+16x^68+32x^73+2x^97

The gray image is a code over GF(2) with n=268, k=8 and d=128.
This code was found by Heurico 1.16 in 0.116 seconds.