The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  4  1  1  2  1  1  4  1  1  2  1  1  1  1  4  2  1  1  1  1  4  2  2  2  0  2  2  0  2  2  0  1  1  2  4  2  2  2  1  1  1  1  1  1  4  4  0  6  4  2  2  2  1  1  1  1  1  1
 0  1  3  6  5  1  0  3  1  6  5  1  0  3  1  6  5  1  0  3  1  6  5  1  4  7  1  2  1  1  4  7  1  2  1  1  4  2  7  1  1  1  4  2  7  1  1  1  0  6  2  6  0  2  0  6  2  0  4  2  2  4  2  2  0  4  3  5  7  1  2  2  1  1  1  1  4  4  0  6  0  2  3  5
 0  0  4  0  4  0  4  0  4  4  0  4  0  0  0  4  0  0  4  4  4  0  4  4  4  4  4  4  4  4  0  0  0  0  0  0  4  4  4  4  4  4  0  0  0  0  0  0  0  4  0  4  4  4  4  0  4  0  4  4  4  4  4  0  4  0  0  0  0  0  4  0  0  0  0  0  4  0  0  0  4  4  4  4
 0  0  0  4  4  4  4  0  0  0  4  4  4  4  4  4  0  0  0  4  4  0  0  0  0  0  0  4  4  4  4  4  4  0  0  0  4  0  4  0  4  0  0  4  0  4  0  4  4  4  4  0  4  0  0  4  4  0  0  4  4  4  0  4  4  4  0  0  0  0  0  4  0  0  0  0  0  4  4  4  0  0  4  4

generates a code of length 84 over Z8 who´s minimum homogenous weight is 82.

Homogenous weight enumerator: w(x)=1x^0+52x^82+32x^83+101x^84+32x^85+18x^86+4x^88+8x^90+3x^92+2x^94+2x^96+1x^104

The gray image is a code over GF(2) with n=336, k=8 and d=164.
This code was found by Heurico 1.16 in 0.213 seconds.