The generator matrix

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

generates a code of length 84 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+189x^74+596x^75+676x^76+1216x^77+1256x^78+1946x^79+1807x^80+2712x^81+2176x^82+2736x^83+2204x^84+3010x^85+2307x^86+2618x^87+1660x^88+1806x^89+1130x^90+1102x^91+588x^92+482x^93+221x^94+128x^95+72x^96+50x^97+49x^98+22x^99+4x^101+4x^103

The gray image is a code over GF(2) with n=336, k=15 and d=148.
This code was found by Heurico 1.16 in 47.1 seconds.