It's some work u gotta make something to hold it and run new cables. It's not to crazy. Check out my pics
No Big. Long red cable, batt box mounted to trunk floor, black cabble to frame rail. Id use 2 Batts in paralell, with a cut off switch, dont forget a long charging wire from the Alt, Personally.. I would also connect an outside plug to the Batts for Jumps. Its an aftermarket conector made for chargers on things like floor scrubbers, you can cut one of the sets of clamps off of some good jumper cables and put the female connector on them. They sell aftermarket kits for that. I did it long ago for fleet vehicles during Govt Service. IMHO. Tech Article...Anyone?
When I did mine I used 1ga to go from the solenoid to the trunk and 4ga to ground to the frame rail at the bumper bolt.
when you measure for the long cable , add 2 feet. my measurement was dead on and that made it a little tight to hook up... don't cheap out on the...disconnect switch...get a good one...the first time... ...JMO...
that's what I used... we have a battery company in town that i took the cables to and had them crimp the correct ends on them...
so i tried to feel my way up to cable and the hose for ac/heat is in he way -____- too many obstacles