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

generates a code of length 74 over Z4 who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+8x^78+7x^80

The gray image is a code over GF(2) with n=148, k=4 and d=78.
This code was found by Heurico 1.16 in 0.0875 seconds.