The generator matrix

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

generates a code of length 56 over Z8 who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+672x^54+120x^56+224x^62+7x^64

The gray image is a code over GF(2) with n=224, k=10 and d=108.
This code was found by Heurico 1.16 in 65.8 seconds.