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  X  1  X  X  1  0  1  X  1  X  X  1  1  1  1  1  X  1  0  1  1  1  1  1  1  1  0  0
 0  X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  X  0  0  X  X  0  X  0  X  0  X  0  X  0  X  X  X  0  X  X  X  0  X  X  X  0  X  X  X  X  X  X  X  0  X  X  0  X  X  X  X  X  0  0  X  0  0  X  0  0  X  0  X  0  0
 0  0  X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  X  0  X  X  0  0  X  0  X  0  X  0  X  0  X  X  X  0  X  X  X  0  X  X  X  0  X  X  X  X  X  X  0  X  X  0  X  X  0  X  0  0  X  X  0  X  0  X  0  X  0  0  0  X  X  0
 0  0  0  X  0  0  0  0  0  0  0  X  X  X  X  X  X  X  X  X  X  0  X  0  X  X  X  X  0  0  0  0  X  0  0  X  X  0  0  X  X  X  0  0  X  X  0  X  X  0  0  X  0  0  0  0  0  X  0  X  X  0  0  X  0  0  X  0  0  X  0  0  X  X
 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  0  0  0  0  0  X  0  X  X  X  0  X  X  X  X  0  X  X  X  X  0  X  X  X  X  X  X  X  0  0  0  X  X  0  0  X  X  X  X  X  X  0  0  0  0  X  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  X  X  X  X  X  X  X  X  X  0  X  X  X  0  X  X  0  0  X  0  0  0  X  0  X  0  X  0  0  X  0  0  0  X  X  0  X  X  0  X  0  0  0  X  X  0  0  0  X  0
 0  0  0  0  0  0  X  X  0  X  X  0  X  X  X  0  0  X  0  0  X  X  X  X  X  X  0  0  0  0  X  X  0  0  0  0  X  X  X  X  X  0  X  0  0  X  0  X  X  0  X  X  0  0  0  X  X  X  0  X  0  X  X  X  0  X  0  X  X  X  X  0  X  0

generates a code of length 74 over Z2[X]/(X^2) who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+26x^69+35x^70+47x^72+50x^73+46x^77+23x^78+15x^80+6x^81+5x^86+1x^88+1x^126

The gray image is a linear code over GF(2) with n=148, k=8 and d=69.
This code was found by Heurico 1.16 in 21.9 seconds.