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

generates a code of length 79 over Z8 who´s minimum homogenous weight is 77.

Homogenous weight enumerator: w(x)=1x^0+130x^77+24x^78+16x^79+23x^80+8x^81+7x^82+8x^84+36x^85+2x^93+1x^98

The gray image is a code over GF(2) with n=316, k=8 and d=154.
This code was found by Heurico 1.16 in 1.28 seconds.