ok now i know it may sound useless too
but if u go ahead with what i suggest u will
love it.. my friend kept 2 cuores before he
went to austrailia and this process rocked.
like asad has mentioned the place for the spare wheel
i suggest make a lasani board, not a box
fix the board with the help of screws
put ur woofer and a port in the board.
edges of the board mein use foam so it
fits and seals to some extent..
keep the spare behind the passenger seat
or if u have radials u dont even need it keep it
at home..
believe me this gives the best sound
as u have connected the woofer to the body
the thump and viberations are amazing and balanced
u will love if u try it..
rest is upto u
if i had a pic u wont even have to think before going ahead
with this ..