The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 71.

Homogenous weight enumerator: w(x)=1x^0+178x^71+263x^72+260x^73+139x^74+226x^75+225x^76+192x^77+55x^78+106x^79+105x^80+56x^81+51x^82+70x^83+31x^84+48x^85+10x^86+12x^87+9x^88+4x^89+6x^92+1x^94

The gray image is a code over GF(2) with n=304, k=11 and d=142.
This code was found by Heurico 1.16 in 0.384 seconds.