The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+150x^74+498x^75+756x^76+1156x^77+1540x^78+1984x^79+1947x^80+2234x^81+2231x^82+2678x^83+2615x^84+2638x^85+2468x^86+2274x^87+1908x^88+1758x^89+1273x^90+1036x^91+603x^92+430x^93+262x^94+144x^95+104x^96+52x^97+8x^98+8x^99+4x^102+2x^103+2x^104+4x^105

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 44.6 seconds.