The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  0  4  1  2  1  1  1  1  1  2  1  4  1  2  4  1  1  0  1  1  4  2  1  1  4  4  1  1  2  1  4  0
 0  2  0  0  0  2  6  2  0  0  4  4  2  2  6  2  0  4  2  2  6  0  6  2  4  6  4  4  6  4  4  2  4  4  2  2  2  2  2  2  0  4  2  2  2  2  6  4  4  6  4  2  2  6  2  0  2  0  4  0  2  6  6  0  2  2
 0  0  2  0  2  2  6  0  0  4  2  2  2  6  4  0  0  0  6  0  4  6  2  4  6  2  2  0  6  0  2  0  6  2  4  6  4  6  0  4  0  4  6  6  0  4  0  6  2  2  6  6  6  4  4  6  2  6  2  2  4  0  4  4  0  2
 0  0  0  2  2  0  6  2  4  2  2  0  0  2  0  6  4  2  0  4  6  4  2  2  4  2  6  0  0  6  6  6  0  0  0  4  2  0  4  6  4  4  4  4  4  6  4  6  6  2  4  6  2  0  2  4  6  6  0  2  4  6  0  0  2  6
 0  0  0  0  4  0  0  0  0  0  0  4  4  4  0  0  4  0  0  0  4  4  0  4  4  0  0  4  0  4  4  0  0  0  4  4  0  4  4  4  0  0  0  0  0  4  4  0  4  4  4  0  4  4  0  4  4  4  0  4  4  0  0  4  4  4
 0  0  0  0  0  4  0  4  4  0  4  4  4  0  4  0  4  4  0  0  0  0  0  4  0  4  0  0  4  0  4  0  4  4  0  4  4  0  4  4  0  0  0  4  4  0  4  4  0  0  4  4  4  0  0  0  4  4  0  0  0  4  0  4  4  4
 0  0  0  0  0  0  4  4  0  4  4  0  4  4  4  4  4  4  4  4  4  0  0  0  4  4  0  0  4  4  0  0  0  4  0  4  0  0  0  4  0  4  0  0  0  0  4  0  0  0  0  4  0  4  4  0  0  4  0  4  4  0  0  0  4  0

generates a code of length 66 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+201x^58+4x^59+267x^60+92x^61+400x^62+188x^63+454x^64+212x^65+553x^66+252x^67+461x^68+196x^69+273x^70+68x^71+190x^72+12x^73+139x^74+79x^76+30x^78+19x^80+3x^82+1x^86+1x^100

The gray image is a code over GF(2) with n=264, k=12 and d=116.
This code was found by Heurico 1.16 in 84.5 seconds.