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  2  1  2  2  2  2  1  1  0  1  1  2  2  1  2  2  1  0  2  0  0  0  0  2
 0  2  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  0  0  0  0  0  0  0  0  0  0  0  0  2  2  2  2  0  2  2  2  2  2  2  0  2  2  2  2  0  2  0  0  2  0  0  0  2  2  2  0  0
 0  0  2  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  2  0  2  2  0  0  2  2  2  2  0  0  0  0  0  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  2  0  2  0  0  0  0  2  2  0  0  0  2  2  0  2  0  0  2  0  2  2  0  2  0
 0  0  0  2  0  0  0  2  2  2  2  2  0  2  2  0  0  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  0  0  0  0  2  2  2  2  2  2  2  2  0  0  0  0  0  0  2  0  0  0  2  0  2  2  2  2  0  2  0  0  2  0  0  0  2  2  0  2  2
 0  0  0  0  2  0  2  2  2  0  0  0  0  2  2  2  2  0  0  0  2  2  2  2  2  2  0  0  0  0  2  2  0  0  2  2  2  2  0  0  0  0  2  2  0  0  2  2  2  2  2  2  0  0  0  2  2  2  0  0  0  0  0  0  2  0  0  2  0  2  0  0  2
 0  0  0  0  0  2  2  0  2  2  0  2  2  2  0  0  2  0  2  2  2  0  0  2  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  2  2  0  0  0  0  2  2  0  2  2  2  0  0  2  2  2  0  0  2  2  2  0  2  0  0  0  0

generates a code of length 73 over Z4 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+42x^70+53x^72+20x^78+6x^80+2x^86+3x^88+1x^112

The gray image is a code over GF(2) with n=146, k=7 and d=70.
This code was found by Heurico 1.16 in 3.2 seconds.