The generator matrix

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

generates a code of length 80 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+176x^74+384x^75+426x^76+400x^77+424x^78+316x^79+368x^80+280x^81+294x^82+168x^83+197x^84+164x^85+130x^86+92x^87+81x^88+64x^89+46x^90+32x^91+22x^92+20x^93+10x^94+1x^100

The gray image is a code over GF(2) with n=320, k=12 and d=148.
This code was found by Heurico 1.16 in 0.773 seconds.