The generator matrix

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

generates a code of length 78 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+54x^70+106x^71+197x^72+310x^73+297x^74+330x^75+337x^76+312x^77+345x^78+316x^79+329x^80+286x^81+255x^82+276x^83+127x^84+62x^85+58x^86+18x^87+17x^88+12x^89+9x^90+2x^91+11x^92+10x^93+2x^94+8x^95+4x^96+3x^98+1x^100+1x^110

The gray image is a code over GF(2) with n=312, k=12 and d=140.
This code was found by Heurico 1.16 in 1.06 seconds.