The generator matrix

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

generates a code of length 80 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+316x^76+80x^78+315x^80+32x^82+214x^84+16x^86+43x^88+5x^92+1x^104+1x^140

The gray image is a code over GF(2) with n=320, k=10 and d=152.
This code was found by Heurico 1.16 in 57.1 seconds.