The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1  1  1  7  1  1  1  1  1  1  1  1  1  1 21  1  1  1  1  1  1  1 35  1  1  1 42  1  1  1  1  1  1  1  1 35 42  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
 0  1  0 35 21 42  1 17 30  8 16 48  6 10  1 18  4 19 36 37 40 31 32 43 27  1 39 47  5 34 29 11 38  1  7 32 10  1  9 15 44 20 45  5  0 26  1  1 35 46 40 14 46 47  6 23 37 34 23  1 47 23 21 36  1 19 28 43 44 42 48 18 30 28
 0  0  1 36 31 16 30 23  9  4  5 48 12  1 47 11 27 17 41 15  7 26 40 22 39  9 28  9 41  3 14 10 20 36 25  8 35 10 34 31 17  2 46 18 40 19 46 20 23 24 29 36 13 44  6 25 33 19 20 44 28  1 42 39 35 13  5 12  5 11  7 30  4 29

generates a code of length 74 over Z49 who´s minimum homogenous weight is 427.

Homogenous weight enumerator: w(x)=1x^0+1356x^427+2184x^428+168x^429+378x^430+1218x^431+1260x^432+2940x^433+7860x^434+7098x^435+1806x^436+2268x^437+3528x^438+2478x^439+3948x^440+10062x^441+7308x^442+1932x^443+2562x^444+3402x^445+1848x^446+3864x^447+9660x^448+8274x^449+1512x^450+3024x^451+4200x^452+2646x^453+3654x^454+8382x^455+6006x^456+756x^457+36x^462+24x^469+6x^476

The gray image is a code over GF(7) with n=518, k=6 and d=427.
This code was found by Heurico 1.16 in 5.8 seconds.