The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+42x^74+182x^75+414x^76+552x^77+753x^78+968x^79+1018x^80+1142x^81+1238x^82+1324x^83+1384x^84+1350x^85+1227x^86+1122x^87+1019x^88+788x^89+620x^90+440x^91+248x^92+192x^93+125x^94+78x^95+63x^96+30x^97+22x^98+14x^99+6x^100+10x^101+3x^102+7x^104+2x^106

The gray image is a code over GF(2) with n=336, k=14 and d=148.
This code was found by Heurico 1.16 in 13.7 seconds.