The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+93x^64+456x^65+1011x^66+1622x^67+2585x^68+3638x^69+4932x^70+6408x^71+7559x^72+9014x^73+10271x^74+11484x^75+12052x^76+11782x^77+11044x^78+9218x^79+7950x^80+6418x^81+4695x^82+3472x^83+2107x^84+1440x^85+842x^86+414x^87+277x^88+136x^89+95x^90+22x^91+16x^92+12x^93+6x^94

The gray image is a code over GF(2) with n=304, k=17 and d=128.
This code was found by Heurico 1.11 in 263 seconds.