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

generates a code of length 84 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+208x^74+460x^76+666x^78+1045x^80+1188x^82+1365x^84+1094x^86+895x^88+548x^90+326x^92+186x^94+100x^96+72x^98+25x^100+6x^102+6x^104+1x^120

The gray image is a code over GF(2) with n=336, k=13 and d=148.
This code was found by Heurico 1.16 in 88.6 seconds.