The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+149x^68+72x^69+258x^70+88x^71+312x^72+96x^73+176x^74+96x^75+265x^76+88x^77+214x^78+72x^79+115x^80+14x^82+9x^84+8x^86+10x^88+2x^90+1x^92+1x^96+1x^112

The gray image is a code over GF(2) with n=296, k=11 and d=136.
This code was found by Heurico 1.16 in 0.39 seconds.