The generator matrix

 1  0  1  1  1  1  1  1  0  1  6  1  1  1  1 2X  1 X+6  1  1  1 X+6  1 2X+3  1  1  1  1 2X+6  1  1  X  1  1  1  1  1  1  1  0 2X  1  1  1  1  1 2X+3  1  1  3  1  1  1  1 X+3  1  1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  6  1  1  1  X
 0  1  1  8 X+6 X+5 2X+7 2X  1 X+7  1  5 2X+8 X+1  6  1 2X+8  1  1 2X+3 2X+1  1 2X+5  1  0 X+8  7 X+5  1 X+6 2X+7  1  3 X+1 2X+3  2  0  1 X+3  1  1 X+7 X+2 X+5  0 X+1  1 X+1  2  1 2X+7 X+6 2X 2X+7  1  4  1  1  X 2X+3 2X+5 X+6  2  4 2X+1 2X+5 X+7  5  5  7 X+5 X+8  1 2X+6 X+8 2X+1 2X+5 X+2  8  1 X+8 2X+3 2X+5  6
 0  0 2X  0  6  6  3  0 2X+3 X+6 X+6 X+6 2X+6 2X+3 X+3  3  0  0 X+3 2X+6 X+3 2X X+6 2X  3 X+3  3 2X+6 X+3 2X+3 2X X+6  X  6 X+6 2X 2X+3 X+3 X+6 2X+3 2X+3  X 2X 2X 2X+3 2X+3  X  3 X+3 X+6  6  6 2X+6 2X+3  0  3 2X  3 X+3  6 X+3 X+6  0  X X+6 2X+6 2X 2X  3 2X+3 X+6  3 2X+3 X+6 X+6  6 2X  0  6  3 2X+3  6 X+6  X
 0  0  0  3  3  0  6  6  6  3  3  0  0  6  0  3  6  6  6  6  0  3  6  0  3  3  6  6  0  0  6  6  3  6  6  3  3  3  3  0  6  6  0  3  6  3  3  3  3  0  0  6  0  3  3  3  6  0  6  0  0  0  0  0  3  3  0  6  6  6  0  3  0  3  6  3  6  3  6  6  0  3  3  3

generates a code of length 84 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 160.

Homogenous weight enumerator: w(x)=1x^0+246x^160+654x^161+616x^162+1380x^163+1644x^164+1278x^165+1986x^166+1644x^167+1394x^168+1620x^169+1932x^170+1188x^171+1434x^172+1002x^173+536x^174+432x^175+306x^176+82x^177+108x^178+78x^179+2x^180+24x^181+6x^182+30x^184+6x^185+24x^187+2x^189+6x^190+12x^191+2x^192+6x^194+2x^201

The gray image is a code over GF(3) with n=756, k=9 and d=480.
This code was found by Heurico 1.16 in 1.83 seconds.