Never used a kit, just amassed what I needed of it wasn't already on the shelf.
I would think your car is essentially the same size as a B-body, if you prefer a kit.
The archives should have several trunk-mounted battery threads, holler back and I can go into detail if needed.
If you don't need a kill switch it's really simple, heavy gauge wire is the concern.
Vent a wet battery outside the car.