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

generates a code of length 69 over Z8 who´s minimum homogenous weight is 66.

Homogenous weight enumerator: w(x)=1x^0+21x^66+170x^68+128x^69+170x^70+20x^72+1x^74+1x^136

The gray image is a code over GF(2) with n=276, k=9 and d=132.
This code was found by Heurico 1.16 in 36.8 seconds.