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  7  1  1  1
 0  7  0  0  7  7 28 14 21  0  7 21 21 21 35 14 14  7 28 14 21 28  0  0 28  7  7 21  0 28 42 28  0 42 21 28 21 42  7 14 14  7 42 28 42 28 21 21  0 42 21  0  7 35  0 35 42 21 35 28  7 42 14 14
 0  0  7  0 35 28 21 35 42 21 21 21 35 35 28  0  0 21  7 28 14  7  7 35  0  7  7  7 35  0 35 14 28 28 28 21 14  7 28  7 28 21 21 35 35 14  0 21 21  0  7 28 42 14 42 21  7 35 35  0 21 42 42 42
 0  0  0  7 35  7 14 42 42 28  7  0 14 42 42 35  7 14 35  7  7 21 14 28 35 35 14  0 35 28 14 28 21 42 21  7 14 42 14 42 28 28  0  0  0  0 14 35  7 21 21 14  0  7 21  7 21  7  0  7 14 35 14  0

generates a code of length 64 over Z49 who´s minimum homogenous weight is 364.

Homogenous weight enumerator: w(x)=1x^0+408x^364+432x^371+2568x^378+12678x^385+180x^392+132x^399+102x^406+108x^413+102x^420+66x^427+18x^434+12x^441

The gray image is a code over GF(7) with n=448, k=5 and d=364.
This code was found by Heurico 1.16 in 0.589 seconds.