The generator matrix

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

generates a code of length 66 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+31x^64+192x^66+30x^68+2x^100

The gray image is a code over GF(2) with n=264, k=8 and d=128.
This code was found by Heurico 1.16 in 0.0819 seconds.