The generator matrix

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

generates a code of length 80 over Z8 who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+26x^78+144x^79+27x^80+8x^81+2x^82+20x^83+2x^84+8x^85+2x^86+8x^87+2x^90+4x^91+2x^92

The gray image is a code over GF(2) with n=320, k=8 and d=156.
This code was found by Heurico 1.16 in 0.191 seconds.