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  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
 0  X  0 X+2  0 X+2  0  X  0 X+2  0  X  0 X+2  0  X  0 X+2  0  X  0 X+2  0  X  0 X+2  0  X  0 X+2  2  X  2 X+2  2  X  2 X+2  X  2  2 X+2  2 X+2  2  X  2  X  2 X+2  2 X+2  2 X+2  2  X  0 X+2  2  X  2  X  2  X  0 X+2  0 X+2  0  2 X+2  X  0  0  0 X+2 X+2  2
 0  0  2  0  0  0  2  0  0  0  0  0  2  0  2  0  0  2  0  2  0  2  0  2  2  2  2  2  2  2  2  2  2  0  2  0  2  0  0  2  2  0  0  0  0  0  0  0  0  2  0  2  2  2  0  2  2  2  2  2  0  2  0  2  0  0  0  0  0  0  2  2  0  2  2  0  0  2
 0  0  0  2  0  0  0  2  0  0  0  0  0  2  0  2  2  2  2  2  2  2  2  2  2  0  2  0  2  0  2  0  0  0  0  0  2  2  2  0  0  0  2  2  2  2  2  0  2  2  0  0  2  0  0  2  2  2  2  0  0  0  0  2  0  0  0  0  2  2  2  2  0  2  0  2  0  0
 0  0  0  0  2  0  2  0  0  2  2  2  2  2  0  2  2  0  2  0  0  2  0  2  0  2  0  2  2  0  2  0  0  0  0  0  2  2  2  2  2  2  0  0  2  0  0  2  2  0  2  2  0  0  0  2  2  2  0  0  2  2  0  0  0  0  0  2  2  2  0  2  2  0  0  2  2  0
 0  0  0  0  0  2  0  2  2  2  2  0  2  0  2  2  0  0  2  2  2  0  0  2  0  2  2  0  2  0  0  2  0  0  2  2  2  2  0  2  0  0  0  2  2  0  2  2  0  2  0  0  2  2  0  0  0  2  0  0  2  2  2  0  0  0  2  2  0  2  0  2  2  2  2  2  0  2

generates a code of length 78 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+29x^74+67x^76+64x^77+199x^78+64x^79+54x^80+27x^82+5x^84+1x^86+1x^152

The gray image is a code over GF(2) with n=312, k=9 and d=148.
This code was found by Heurico 1.16 in 0.337 seconds.