The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+119x^68+224x^69+454x^70+382x^71+778x^72+488x^73+923x^74+548x^75+855x^76+450x^77+749x^78+434x^79+560x^80+264x^81+395x^82+148x^83+186x^84+96x^85+62x^86+16x^87+29x^88+8x^89+5x^90+6x^91+6x^93+3x^94+1x^98+2x^99

The gray image is a code over GF(2) with n=304, k=13 and d=136.
This code was found by Heurico 1.16 in 2.92 seconds.