The generator matrix

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

generates a code of length 84 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+64x^76+288x^77+416x^78+722x^79+557x^80+712x^81+642x^82+710x^83+557x^84+754x^85+418x^86+534x^87+371x^88+402x^89+281x^90+242x^91+165x^92+166x^93+59x^94+56x^95+39x^96+14x^97+5x^98+8x^99+6x^100+3x^102

The gray image is a code over GF(2) with n=336, k=13 and d=152.
This code was found by Heurico 1.16 in 2.83 seconds.