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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+66x^72+32x^73+48x^74+192x^75+104x^76+32x^77+16x^78+20x^80+1x^144

The gray image is a code over GF(2) with n=300, k=9 and d=144.
This code was found by Heurico 1.16 in 0.311 seconds.