The generator matrix

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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+132x^70+223x^72+178x^74+186x^76+180x^78+82x^80+13x^82+14x^84+8x^86+5x^88+1x^96+1x^130

The gray image is a code over GF(2) with n=300, k=10 and d=140.
This code was found by Heurico 1.16 in 0.229 seconds.