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  X  1  1  X  1  1  X  1  X  1  1  1  1  1  X  1  1  1  1  1  1  1  X  1  X  1
 0  3  0  0  0  0  0  0  0  0  3  6  6  3  3  3  0  6  3  6  3  0  3  0  6  3  0  6  3  6  6  6  3  3  3  0  6  6  0  0  0  3  6  3  0  6  3  6  3  6  0  6  3  0  3  0  3  3  3  3  6  6  6  3  0  0  0  6  6  6  0  3  0  0  0  6
 0  0  3  0  0  0  0  3  6  6  6  0  0  6  3  6  3  0  3  3  0  6  6  0  3  3  6  0  3  0  6  6  6  3  6  0  6  6  3  6  3  6  6  6  0  0  6  6  0  3  3  0  3  3  3  6  3  3  0  6  6  3  0  3  3  6  0  3  3  3  0  0  3  0  6  0
 0  0  0  3  0  0  3  6  0  6  0  0  6  3  3  6  0  3  0  6  0  6  6  0  6  0  3  6  6  3  3  3  6  0  0  6  6  3  6  3  0  6  6  3  3  6  3  6  6  0  6  3  6  3  6  3  3  6  3  0  6  3  6  3  3  6  6  3  3  6  6  3  6  0  6  3
 0  0  0  0  3  0  6  6  3  0  6  6  6  0  6  6  0  6  3  0  6  6  0  3  6  0  6  3  0  3  0  3  0  6  0  6  0  6  3  0  6  3  6  3  6  0  6  6  0  3  6  3  0  6  6  0  6  6  6  0  0  6  0  0  6  0  6  6  0  6  0  3  3  6  0  6
 0  0  0  0  0  3  6  6  6  6  6  6  3  6  3  3  6  3  6  6  6  6  0  6  0  3  0  0  6  3  6  0  6  3  0  3  3  0  3  0  0  3  6  3  3  3  3  0  3  3  3  6  3  6  6  3  3  0  6  6  6  6  0  6  3  0  0  0  6  3  6  6  0  6  3  0

generates a code of length 76 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 141.

Homogenous weight enumerator: w(x)=1x^0+166x^141+176x^144+204x^147+522x^150+4374x^152+492x^153+336x^156+156x^159+32x^162+44x^168+16x^171+24x^177+10x^180+6x^186+2x^207

The gray image is a code over GF(3) with n=684, k=8 and d=423.
This code was found by Heurico 1.16 in 57.1 seconds.