The generator matrix

 1  0  1  1  1  0  1  1  0  1  0  1  1  2  1  2  1  1  1  6  1  1  1  6  4  1  1  6  1  1  1  4  0  1  1  2  1  1  1  1  0  1  1  1  1  0  1  1  0  1  1  2  4  1  1  1  1  1  6  0  1  1  1  6  1  1  4  1  0  1  1  2  1  6  1  4  6  1  1  4  4  1  1  0  0  2  1
 0  1  1  0  3  1  0  3  1  4  1  7  3  1  6  1  2  1  2  1  5  6  5  1  1  6  1  1  2  2  4  1  1  7  3  1  7  1  0  5  1  3  6  4  7  1  0  5  1  1  4  1  1  5  3  3  4  5  1  1  5  3  0  1  4  5  1  1  2  5  6  4  4  1  6  2  1  5  1  0  1  4  2  1  1  4  4
 0  0  2  0  2  0  2  0  6  2  2  0  6  2  2  4  0  4  6  6  4  4  6  0  2  2  4  0  0  2  0  4  6  0  6  6  2  2  2  4  4  4  2  2  2  4  0  2  2  4  0  0  2  0  2  0  6  4  0  0  0  4  6  4  2  6  4  6  4  6  4  2  4  2  6  2  6  2  6  4  6  2  2  2  2  0  0
 0  0  0  2  2  6  2  0  0  0  2  6  4  4  6  2  6  6  4  6  0  0  6  4  4  2  6  4  0  4  2  2  6  2  2  6  4  4  6  0  4  0  4  0  6  4  6  4  0  6  4  6  0  2  0  2  6  2  4  6  6  2  6  4  0  4  6  0  6  2  2  4  0  4  6  0  4  0  2  2  2  0  0  6  2  2  2
 0  0  0  0  4  0  0  0  0  0  0  4  0  4  0  4  4  4  0  4  4  0  0  4  4  4  0  0  4  0  0  4  0  0  0  4  0  4  0  4  0  0  4  0  4  4  4  0  0  0  0  4  4  0  4  4  4  0  0  4  4  0  0  4  0  0  4  4  4  4  4  4  4  4  0  0  4  4  0  0  0  0  0  4  0  0  4
 0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  4  4  0  4  4  4  4  4  4  4  0  4  4  4  4  0  4  0  4  0  0  4  0  0  4  0  4  0  4  0  0  4  0  4  4  4  4  4  0  0  4  4  0  0  4  4  4  4  4  0  0  4  0  0  0  0  0  0  4  4  4  0  4  4  4  0  0  4  4
 0  0  0  0  0  0  4  0  0  4  0  4  4  4  0  4  0  0  0  0  4  0  4  0  0  4  4  0  4  0  4  4  0  4  0  4  0  4  4  0  0  0  0  4  0  4  0  4  4  0  4  0  4  0  0  0  4  0  4  4  4  4  4  4  4  4  0  4  0  4  4  0  4  4  4  4  0  4  4  4  0  0  4  4  0  0  0
 0  0  0  0  0  0  0  4  0  0  0  0  4  4  0  4  4  0  0  4  0  0  4  0  4  0  0  0  0  4  4  0  4  0  4  4  0  4  4  0  0  4  4  0  4  4  0  0  0  0  4  0  4  4  4  4  4  4  4  0  0  4  0  4  4  4  4  0  4  4  4  0  4  0  4  0  0  4  4  0  0  4  0  0  4  0  4
 0  0  0  0  0  0  0  0  4  0  4  0  0  4  4  0  4  4  4  0  0  0  0  4  0  4  4  0  0  4  4  0  4  4  4  4  0  0  4  0  4  4  4  4  4  4  0  4  4  4  0  0  0  4  4  4  0  4  0  4  4  0  4  4  4  4  0  0  4  0  4  4  0  0  0  0  4  4  4  4  4  0  4  0  4  0  4

generates a code of length 87 over Z8 who´s minimum homogenous weight is 74.

Homogenous weight enumerator: w(x)=1x^0+70x^74+102x^75+222x^76+392x^77+452x^78+644x^79+935x^80+1212x^81+1549x^82+1898x^83+2288x^84+2542x^85+2731x^86+2884x^87+2686x^88+2504x^89+2283x^90+1928x^91+1540x^92+1168x^93+889x^94+608x^95+411x^96+312x^97+176x^98+102x^99+77x^100+58x^101+29x^102+24x^103+22x^104+4x^105+9x^106+2x^107+8x^108+3x^110+1x^112+1x^114+1x^116

The gray image is a code over GF(2) with n=348, k=15 and d=148.
This code was found by Heurico 1.16 in 66.6 seconds.