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

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

Homogenous weight enumerator: w(x)=1x^0+61x^72+120x^74+128x^75+155x^76+40x^78+6x^80+1x^148

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 5.76 seconds.