relocated my battery to trunk now alternator not charging enough. i'm getting 12v al the alternator with engine running. the battery is new fully charged and I get 12.7v at the battery itself. alternator itself tests good so I wonder if my wiring is wrong.
heres the wiring
2 g welding cable from battery to taylor cuttoff switch
2 g welding cable from switch to starter
4 g cable from switch to alternator
2 g battery ground to frame/ 4g ground strap to pass cylinder head and frame to front of engine
accessories connected to starter.

by the way I'm running an electric water pump set up running a march pulley system, with a march 1.75 pulley on the alternator. any ideas where I went wrong?

 

probably not the issue but, 0/2ga would be better from rear to front.