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  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
 0  X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  X  0  X  X  0  X  X  0  X  X  X  X  0  X  0  X  X  X  0  0  X  X  0  X  X  0  X  X  X  0  0  X  X  0  X  0  X  0  0  X  X  X  X  X  X  X  0  0  0  0  0  0  0  X  X  0
 0  0  X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  X  X  X  0  X  X  0  X  X  0  X  0  X  0  X  X  X  0  X  X  X  0  X  0  X  X  X  0  0  X  X  X  0  X  X  X  X  X  X  X  X  X  0  0  0  0  0  0  0  0  0  0  X  X  0  0
 0  0  0  X  0  0  0  0  0  0  0  X  X  X  X  X  X  X  0  X  X  X  X  0  X  0  0  X  0  X  X  0  0  0  X  X  0  X  X  0  X  X  X  0  X  X  0  X  0  0  0  X  0  X  X  0  0  X  0  X  X  0  0  0  0  0  0  0  X  X  X  0  X  0
 0  0  0  0  X  0  0  0  X  X  X  X  X  0  X  X  0  0  0  0  0  0  0  0  0  0  0  X  X  0  X  X  X  0  X  X  X  0  X  0  X  0  X  0  0  X  X  X  X  X  0  0  X  X  X  X  0  0  X  0  X  X  X  0  0  0  0  X  X  0  0  0  0  0
 0  0  0  0  0  X  0  X  X  X  0  0  0  0  X  X  X  X  0  0  0  0  0  0  0  0  X  X  0  X  X  0  0  X  X  0  X  X  0  X  X  X  0  X  0  0  X  0  X  X  0  X  X  0  X  0  X  X  0  X  X  0  X  X  0  0  X  X  0  0  0  0  0  0
 0  0  0  0  0  0  X  X  0  X  X  0  X  X  X  0  0  X  0  0  0  0  X  X  X  X  X  0  X  X  0  0  0  0  0  0  X  X  0  X  X  0  X  0  X  X  0  X  0  0  X  0  X  0  X  X  X  0  0  X  X  X  X  0  0  X  X  0  0  0  0  0  0  0

generates a code of length 74 over Z2[X]/(X^2) who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+13x^68+50x^72+128x^74+50x^76+13x^80+1x^148

The gray image is a linear code over GF(2) with n=148, k=8 and d=68.
This code was found by Heurico 1.16 in 0.0855 seconds.