The generator matrix

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

generates a code of length 84 over Z8 who´s minimum homogenous weight is 73.

Homogenous weight enumerator: w(x)=1x^0+82x^73+248x^74+468x^75+811x^76+836x^77+1661x^78+1464x^79+2068x^80+2014x^81+2888x^82+2378x^83+3234x^84+2322x^85+2922x^86+2012x^87+2057x^88+1410x^89+1423x^90+796x^91+646x^92+328x^93+284x^94+144x^95+132x^96+38x^97+37x^98+30x^99+9x^100+10x^101+9x^102+4x^103+2x^104

The gray image is a code over GF(2) with n=336, k=15 and d=146.
This code was found by Heurico 1.16 in 52.1 seconds.