The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 71.

Homogenous weight enumerator: w(x)=1x^0+50x^71+247x^72+48x^73+81x^74+18x^75+168x^76+64x^77+16x^78+44x^79+215x^80+16x^81+28x^82+12x^83+8x^84+2x^87+1x^88+2x^90+2x^91+1x^138

The gray image is a code over GF(2) with n=304, k=10 and d=142.
This code was found by Heurico 1.16 in 4.71 seconds.