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

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

Homogenous weight enumerator: w(x)=1x^0+132x^78+38x^80+66x^82+6x^84+2x^90+8x^94+1x^96+2x^100

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 0.341 seconds.