The generator matrix

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

generates a code of length 73 over Z4 who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+80x^63+152x^64+202x^65+170x^66+208x^67+280x^68+230x^69+254x^70+260x^71+232x^72+226x^73+212x^74+202x^75+209x^76+176x^77+198x^78+176x^79+137x^80+122x^81+80x^82+68x^83+62x^84+58x^85+44x^86+28x^87+14x^88+10x^89+2x^90+2x^91+1x^92

The gray image is a code over GF(2) with n=146, k=12 and d=63.
This code was found by Heurico 1.16 in 9.23 seconds.