The generator matrix

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

generates a code of length 42 over Z8 who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+454x^36+1036x^38+1825x^40+1604x^42+1884x^44+916x^46+391x^48+28x^50+46x^52+7x^56

The gray image is a code over GF(2) with n=168, k=13 and d=72.
This code was found by Heurico 1.16 in 98.3 seconds.