[LS short box]

Check with Captain Fab on this web site booster bracket wise.
My battery is remote mounted in front of the right rear wheel. See pic
I love to hide wiring.
I used a Painless universal chassis harness. I welded up the stock fuse block hole and made a new front chassis hole (small round with grommet) to the left and kind of behind the inner fender. I moved the Painless fuse block back a couple inches so I had small hole for just the front chassis wiring. Ran those wires along the left frame rail up to the radiator support. The main power wire for the fuse block I ran from the center stud on the starter thru the supplied maxi fuse. You can just see it under the heater box in the pic.
LS wiring I ran the engine wiring harness behind the right cylinder head, thru the firewall and mounted the ECM and fuse block behind the glove box. Hard to see but just behind the right coil cover.