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
 0  7  0  0  0  0  0  7 42  7 42 28  7 14 14 42 35 14 21 28  7 28 35 28 35 28  0  7 35 21  7 28 35 28 42 28  7 28  7 28  7  0 28 42  0  7 14 42  0  0  7 14 21 14  0 28  0 42 42  0
 0  0  7  0  0  7  7 35  7 42  0 42 21 28 14  0 14 28 42 28 42 35 28 21  0 14 14 28  7 14  7  7 28  0 35 28  7  0 35 42 14 28 28  0 28 21 14 14  7 28  0 14  0 14 21 35 28 42 42  7
 0  0  0  7  0 35 28 35 42 28 28  7 21 42  7 21 21 35  0 35 28 42  0  7 21  0 21 21  0 42 42  0 14 42 42 42 21 14 21 42 14 35 42 28 35 35 14 14 42 28 21  7 42 14 42 14 28  7 14 35
 0  0  0  0  7 35  7 14 28 35 14  0  7 28  7 28 42 42 35  7  7 21 28  7 28  0 35 28 28 35  0 21  0 14 35  7 28  0 14 21 42 42 14 42 14  0  0 14  7 35 42 28 21 21  7 28  0 28 28 28

generates a code of length 60 over Z49 who´s minimum homogenous weight is 322.

Homogenous weight enumerator: w(x)=1x^0+222x^322+1044x^329+1602x^336+1638x^343+1944x^350+1974x^357+100842x^360+2232x^364+2010x^371+1788x^378+1194x^385+834x^392+276x^399+42x^406+6x^420

The gray image is a code over GF(7) with n=420, k=6 and d=322.
This code was found by Heurico 1.16 in 13.5 seconds.