The generator matrix

 1  0  0  0  1  1  1  2  1  1  2  1  1  2  0  1  2  1  0  2  0  1  2  1  1  1  0  0  2  0  0  1  2  1  1  1  2  1  1  0  1  1  2  1  0  1  1  1  1  0  1  2  1  2  1  1  0  1  0  2  1  1  2  0  1  2  1  1  1  1
 0  1  0  0  2  1  3  1  0  0  0  3  3  1  1  1  1  2  2  1  1  3  1  0  1  2  0  1  2  2  1  0  0  1  2  0  0  2  3  1  3  2  1  1  2  3  3  3  3  0  1  2  2  1  1  1  1  0  1  1  2  3  2  1  0  2  1  1  2  2
 0  0  1  0  0  0  0  0  1  3  1  1  3  3  1  1  1  2  2  2  2  2  3  2  3  3  1  1  1  1  3  1  1  2  2  3  1  0  3  3  0  2  2  2  0  2  2  0  0  1  0  1  0  1  1  2  3  1  2  0  1  1  0  0  3  2  0  3  3  0
 0  0  0  1  1  3  2  1  1  2  3  3  0  2  1  0  2  0  1  3  0  3  0  1  3  1  2  3  1  2  0  2  0  2  2  1  1  2  3  3  0  1  1  3  1  0  2  1  3  3  0  3  3  3  2  0  1  0  2  2  0  2  0  1  3  1  2  1  0  1

generates a code of length 70 over Z4 who´s minimum homogenous weight is 67.

Homogenous weight enumerator: w(x)=1x^0+30x^67+64x^68+62x^69+28x^70+28x^71+20x^72+2x^76+4x^78+3x^80+2x^83+6x^84+2x^85+4x^87

The gray image is a code over GF(2) with n=140, k=8 and d=67.
This code was found by Heurico 1.16 in 0.332 seconds.