I am thinking of doing this but it needs to be legal for the track. I did a search and came up with no pictures or a solution to having a type of box in the spare tire hatch. Any help or pics would be great. Thanks a lot-Bryan

 

If you're not using the spare and jack that's in there, you should have room to put either a box or a sealed gel battery on the bottom. You just have to drill some holes to put your bolts through. You can get boxes from Jegs, Summit, etc and sealed gel batteries (Optima, etc) just about anywhere. Jegs also sells hold-down brackets for Optimas.

 

What you actually have to do depends alot on how much of a stickler your local track techs are.

If you want to be sure, get (or borrow) a rule book for the sanctioning body of your track (NHRA, IHRA, etc...)

Generally speaking, you must have at least two 3/8" bolts holding the battery down. J-bolts are usually not allowed unless the bottems are welded to the tray/box. In a hatchback car (like a 3rd gen F-body) you are required to use a sealed box that is vented outside of the car (like the Moroso #74050). This is not required if you use a dry cell that are not vented and do not produce gasses while charging, spiral gell cells (like Optimas) while referred to as "sealed" are vented (two small sintered round vents on top) and can out gas and must be in a sealed box to truely be legal. Some track techs allow mounting in the spare well without a sealed box as long as the plastic trim panel is in place, but most do not since it is a log way from being air tight.
Many tracks also require cars with a rear mounted battery to have an approved remote shut off switch (for the positive wire) clearly labled on the back of the car.

Depending on what you end up needing to use, it shouldn't be too hard to mount if the spare tire is gone.
If you use a box instead of a tray, you can just sit it in the bottem of the well and bolt the bottom through the floor of the well, and the side to the vertical surface between the spare tire well and the luggage compartement well. You can back up the other side of the sheet metal you are mounting it to with strips of metal, say, 1.5"-2" wide, and the length of the battery box or so. Or If you use a steel box, you could just get it MIG welded in.
If you plan to keep the spare tire, that's a differrent story. You can get some pretty small dry cells though, and they don't require a sealed box. You could fit one of those in with a spare.

 

Thanks for all of the info. As far as it being legal at a track, i would have to say that i will have to go by the book on this one! I live 20min from Englishtown and so it should probally be legal in everyway if i were to run there. I was checking out that box from Moroso in Summit for $100. Not bad! When i go to do this i will also need to get the proper battery too. Right now i have a Die Hard Gold in there and i would rather have a dry cell. Well, it seems like i have gotten pretty much all of the info i would need. So, thanks again-Bryan