The generator matrix

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

generates a code of length 70 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+66x^58+390x^59+846x^60+1584x^61+2355x^62+3454x^63+4798x^64+6008x^65+7559x^66+9452x^67+10753x^68+11812x^69+12341x^70+11886x^71+11341x^72+9562x^73+7816x^74+6262x^75+4643x^76+3332x^77+2015x^78+1238x^79+722x^80+372x^81+195x^82+144x^83+78x^84+32x^85+5x^86+6x^87+2x^88+2x^89

The gray image is a code over GF(2) with n=280, k=17 and d=116.
This code was found by Heurico 1.11 in 237 seconds.