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

generates a code of length 78 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+29x^74+67x^76+64x^77+199x^78+64x^79+54x^80+27x^82+5x^84+1x^86+1x^152

The gray image is a code over GF(2) with n=312, k=9 and d=148.
This code was found by Heurico 1.16 in 0.257 seconds.