Re: Fiberglass Battery Box
What do you mean what kit should you buy?
You can pick up a couple packages of fiberglass mat and cloth, and a small can of polyester resin at Home Depot for probably $20. Start with a custom-made cardboard box the size you want, and coat it with resin and fiberglass.
Fiberglass is really easy, just a little messy. I made a few custom pieces with it for my old Mustang a few years ago, but haven't really used the stuff recently.
You'll find plenty of resources on Google on how to work with 'glass.