The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+118x^69+255x^70+256x^71+292x^72+340x^73+356x^74+364x^75+332x^76+316x^77+343x^78+302x^79+230x^80+216x^81+150x^82+78x^83+30x^84+24x^85+30x^86+20x^87+8x^88+8x^89+12x^90+2x^91+2x^92+2x^93+4x^94+2x^95+1x^96+1x^98+1x^106

The gray image is a code over GF(2) with n=304, k=12 and d=138.
This code was found by Heurico 1.16 in 48.1 seconds.