What location in the trunk would be a good ground for my fuel cell's sending unit? Also, what connection could i make to make sure my dash is grounded well? I want to make sure my gauge reads as accurate as possible.
Pretty much any bare metal location will work. There is a ground screw for the tail-lights located on the center tail-light panel support. Just under the gas tank filler neck.
Assuming a good connection from battery negative to body, any, clean, solid spot on body is as good as next.
Just to add …… I don't think you need to do anymore to the dash for a good ground. It is bolted to the body very well through both the brackets and steering column.
