Spending close to $200 to move the battery to the trunk correctly on a DD or street car is not worth it IMO. To do it right, you need to buy the
battery box
15 feer of 1 or 0 welding cable
inline fuse
battery cable terminals
cable tie downs or brackets
cut off switch and/or 2nd starter relay
shrink wrap
Plus you have to drop the tank, run the wires, etc. I've done it on several cars in the past, but only for drag or show. I'd spemd the money elsewhere.