The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+379x^68+671x^70+887x^72+693x^74+520x^76+383x^78+292x^80+153x^82+89x^84+18x^86+7x^88+2x^90+1x^96

The gray image is a code over GF(2) with n=296, k=12 and d=136.
This code was found by Heurico 1.16 in 3.37 seconds.