The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+345x^70+753x^72+864x^74+653x^76+538x^78+401x^80+266x^82+145x^84+83x^86+29x^88+14x^90+1x^92+2x^94+1x^100

The gray image is a code over GF(2) with n=304, k=12 and d=140.
This code was found by Heurico 1.16 in 10.1 seconds.