The generator matrix

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

generates a code of length 77 over Z8 who´s minimum homogenous weight is 67.

Homogenous weight enumerator: w(x)=1x^0+126x^67+377x^68+714x^69+1089x^70+1464x^71+1733x^72+1916x^73+2281x^74+2588x^75+2802x^76+2804x^77+2733x^78+2608x^79+2306x^80+2080x^81+1601x^82+1250x^83+964x^84+526x^85+316x^86+228x^87+126x^88+44x^89+38x^90+20x^91+9x^92+12x^93+6x^94+4x^95+2x^96

The gray image is a code over GF(2) with n=308, k=15 and d=134.
This code was found by Heurico 1.16 in 41.8 seconds.