The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+63x^76+108x^77+233x^78+300x^79+319x^80+342x^81+310x^82+314x^83+304x^84+334x^85+282x^86+278x^87+228x^88+226x^89+188x^90+86x^91+56x^92+32x^93+21x^94+8x^95+16x^96+4x^97+18x^98+4x^99+4x^100+10x^101+2x^102+2x^103+1x^108+2x^110

The gray image is a code over GF(2) with n=336, k=12 and d=152.
This code was found by Heurico 1.16 in 1.12 seconds.