The generator matrix

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

generates a code of length 74 over Z8 who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+40x^69+247x^70+32x^71+79x^72+88x^73+178x^74+16x^75+30x^76+40x^77+184x^78+16x^79+15x^80+24x^81+30x^82+2x^84+1x^86+1x^136

The gray image is a code over GF(2) with n=296, k=10 and d=138.
This code was found by Heurico 1.16 in 34.5 seconds.