The generator matrix

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

generates a code of length 84 over Z3[X]/(X^2) who´s minimum homogenous weight is 163.

Homogenous weight enumerator: w(x)=1x^0+66x^163+66x^165+192x^166+108x^168+108x^169+56x^171+78x^172+42x^175+10x^177+2x^222

The gray image is a linear code over GF(3) with n=252, k=6 and d=163.
This code was found by Heurico 1.16 in 0.112 seconds.