The generator matrix

 1  0  0  1  1  1  1  X  1  1 2X  1  1  X  1  1  1  1  1  1  1  X  1  0  1 2X  0  1  1  1  1  1  1 2X  X  1  0  1  0  1  1  1  1  0  1  X  0  0  1  1  1  1  1  1  1  1  1  1  X 2X  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1
 0  1  0  0  0 2X+1  1  1 2X+2 2X+1  1  2  2  1  X X+1 2X+2 2X  2  X  1  1 X+2  0 X+1  1  1 2X 2X+1  1 2X 2X+2 2X+2  1  1 X+1  X  X  1  2 X+1 X+2  1  0 X+2  1  1  1  1  2 X+2  1 2X  0  X X+1 2X+1 2X+2  0  1  2  X  1  0  X 2X+1 2X  X 2X  0 X+2  2  1 X+1 X+2
 0  0  1  1  2 2X+2  1 X+2 2X+1 2X  1  0 X+2 2X 2X+1  1 2X+1  X 2X 2X+2  2 X+2 X+2  1  X  1  2 2X  X 2X+2  X 2X+1  2 2X+1 2X 2X+1  1 X+2 2X  1  0  0  2  1 2X X+1  X  1 2X+1 2X X+2 2X+1 X+2  1 2X+2  1  X  X  1  X 2X  2 2X 2X+2 2X  2 2X+1 2X+1  0  X  1  2  1 X+1 X+2
 0  0  0 2X  0  0  0  0  0 2X  X 2X  X  X  X  X 2X  X  X  X  0 2X  X  X  0 2X  X  0 2X  X  X 2X  X  0  X 2X  0  0  0  X  0  X  X 2X 2X  X 2X  X  X  0  0  0  0  X 2X 2X  X  0 2X 2X 2X 2X 2X  0  X  X  0  X  0 2X  0  X  0 2X  0
 0  0  0  0  X  X  X  0  X  0  X  0 2X  X 2X 2X  0 2X  0  0 2X  0  0 2X 2X  X  0 2X  X  X  0  X  X  X  0 2X  X 2X  X  0  X  X 2X 2X  X 2X  0  0  0  0  X 2X  0  0 2X  X  X  X  0  X 2X  0 2X 2X 2X  0  0  X 2X  0  X 2X  X 2X  0

generates a code of length 75 over Z3[X]/(X^2) who´s minimum homogenous weight is 140.

Homogenous weight enumerator: w(x)=1x^0+372x^140+340x^141+600x^143+354x^144+846x^146+304x^147+744x^149+386x^150+570x^152+246x^153+408x^155+202x^156+384x^158+148x^159+252x^161+104x^162+132x^164+68x^165+48x^167+24x^168+18x^170+6x^171+2x^177+2x^192

The gray image is a linear code over GF(3) with n=225, k=8 and d=140.
This code was found by Heurico 1.16 in 96.1 seconds.