The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  0  1  1  1  2  1  1  1  0  1  2  1  1
 0  2  0  2  0  0  2  6  4  4  2  6  0  4  2  2  0  2  4  6  6  0  2  0  4  4  6  2  0  0  6  2  0  4  2  6  0  2  4  2  4  0  0  2  4  6  2  0  6  2  6  6  0  2  2  6  4  2  6  2  6  2  4  2  6  6  2  6  0  2  6  0  4  0
 0  0  2  2  0  6  2  4  0  2  2  0  0  2  6  0  4  2  6  4  2  0  4  6  4  2  0  6  0  6  2  4  0  2  2  0  2  6  0  4  6  4  6  6  4  4  0  0  6  2  0  2  4  0  2  2  4  4  0  0  6  4  4  6  6  0  6  6  4  0  2  6  2  0
 0  0  0  4  0  0  4  0  0  4  0  4  4  4  0  4  4  4  4  0  0  0  4  0  4  0  0  0  4  4  4  4  0  0  0  0  0  4  4  0  4  4  4  4  0  4  0  4  4  0  4  4  4  0  0  0  0  0  0  0  4  0  4  0  4  4  4  0  0  4  4  0  4  0
 0  0  0  0  4  0  0  0  4  4  4  4  0  4  4  4  4  4  0  4  0  0  0  4  0  4  4  0  4  0  4  0  4  0  0  0  4  0  4  4  4  0  0  4  0  4  0  4  0  4  0  4  0  4  0  4  4  0  0  4  0  0  0  0  4  0  0  4  4  0  0  0  4  4
 0  0  0  0  0  4  4  4  4  0  4  0  4  4  0  4  4  0  4  4  4  4  0  0  0  4  0  0  0  0  4  4  4  0  0  0  0  4  0  4  4  0  4  4  4  4  4  4  0  0  4  0  4  0  4  4  0  4  4  4  4  0  4  4  0  4  0  4  0  0  4  4  0  0

generates a code of length 74 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+47x^68+52x^69+64x^70+72x^71+92x^72+140x^73+120x^74+136x^75+88x^76+60x^77+52x^78+40x^79+27x^80+4x^81+14x^82+8x^83+1x^84+4x^86+1x^90+1x^138

The gray image is a code over GF(2) with n=296, k=10 and d=136.
This code was found by Heurico 1.16 in 0.241 seconds.