The generator matrix

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

generates a code of length 42 over Z8 who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+46x^40+48x^41+67x^42+48x^43+40x^44+3x^46+1x^50+1x^54+1x^64

The gray image is a code over GF(2) with n=168, k=8 and d=80.
This code was found by Heurico 1.16 in 0.0168 seconds.