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

generates a code of length 40 over Z8 who´s minimum homogenous weight is 38.

Homogenous weight enumerator: w(x)=1x^0+35x^38+48x^39+86x^40+48x^41+35x^42+1x^46+1x^50+1x^64

The gray image is a code over GF(2) with n=160, k=8 and d=76.
This code was found by Heurico 1.16 in 0.0144 seconds.