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

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

Homogenous weight enumerator: w(x)=1x^0+39x^64+48x^65+48x^66+48x^67+8x^68+16x^69+8x^70+16x^71+8x^72+8x^74+8x^80

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.