The generator matrix

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

generates a code of length 70 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+228x^64+120x^65+568x^66+236x^67+712x^68+220x^69+454x^70+216x^71+413x^72+80x^73+274x^74+44x^75+218x^76+76x^77+106x^78+16x^79+77x^80+16x^81+6x^82+14x^84+1x^88

The gray image is a code over GF(2) with n=280, k=12 and d=128.
This code was found by Heurico 1.16 in 1.87 seconds.