AMP bypass

I always to the amp gauge bypass it is a great upgrade.
I also do the big three upgrade..which is 4 gauge from battery to alt and 4 gauge from battery to ground and 4 gauge from engine block to ground.
As for the battery in the trunk what I did was I ran a 0/1 gauge wire from the battery to the starter motor off a Ford solinod then installed a juction block in the engine bay and ran a 4 gauge wire from the alt to it and another 4 gauge to the battery in the trunk to drive my stereo.
I like this type of juction block as it has 8 other terminals that you can grab power from.
I have also used a blade type 30amp fuse in place of the fuseable link in a couple cars without any issues.
AL