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

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

Homogenous weight enumerator: w(x)=1x^0+52x^38+32x^39+93x^40+32x^41+36x^42+9x^44+1x^76

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 0.0273 seconds.