Battery placement...

[vettestr]

It has been mentioned that a considerable amp loss can be induced by mounting battery in trunk. Larger diameter or more wire per diameter will overcome any possible issues. If you have very poor quality cables this may be an issue but not a common problem as most cables are OK to fair but better is easy to install.
We build all of our own battery cables in-house with welding lead cable. The welding cables insulation is very good and has twice the amount of wires per diameter yet is very flexible even when the OD being used is 1/2 inch. More individual wires per diameter inch reduces voltage drop and resistance allowing longer cable length to be used. In the end this is a little overkill but it will last forever, easy to run and great performance so use of welding lead cable is a no brainer given the cost is reasonable for benefits (welding supply stores I think retail it at about $3 bucks per foot and 17 feet is more than enough, 12 feet min. is needed). We also use multiple ground cables for best results. (battery to chassis- chassis to engine- ground lug to chassis for dash area)
Home propane torches will allow soldering of ends to cable but it will take a little longer. Use heat shrink (home depot) on these ends and use acid free solder with paste on all electrical connections. Heat shrink on ends should be color coded for extra touch of style and I often double it up to seal from moisture best I can.