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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+13x^72+60x^73+45x^74+68x^75+134x^76+68x^77+50x^78+60x^79+12x^80+1x^146

The gray image is a code over GF(2) with n=304, k=9 and d=144.
This code was found by Heurico 1.16 in 0.155 seconds.