I need to run a mobile home (trailer) ground for a new install. Consisting of 45 feet of number 6 copper from the trailer frame through the two ground rod clamps to the main panel mounted on a stand off about 30 feet away from the trailer. Lowe's had 29 feet left on a roll on the wire tree and a roll in a box of 25 feet. I overlapped and brazed the ends together to give me enough length. Will this pass inspection?

Absolutely NOT.

You need an irreversible mechanical splice for a grounding electrode conductor.