The generator matrix

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

generates a code of length 78 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+21x^76+108x^77+20x^78+72x^79+9x^80+12x^81+9x^82+1x^86+1x^92+1x^98+1x^102

The gray image is a code over GF(2) with n=312, k=8 and d=152.
This code was found by Heurico 1.16 in 0.151 seconds.