Box Measurements?

what are the best box measurements for the trunk of mey 93 thnuderbird
P.S. i got 2 JL audio 10"w3v2s at 300 watts each but, i will be giving them 400 each at 2ohms with the e1800d 800watt amp

That depends on the kind of sound your going for. Are you using a ported/bandpass/sealed box?

I Ment To Put In Sealed. Yes, I Want Sealed So I Guess From What I Know I Could Be The Size Of The Trunk Up To The Spare Wheel

The Box. Not Me! ;)

your subs should come with a manual, and in that manual should be all the information you need. It will tell you the type of enclosure recommended, and the amount of area necessary for best sound.

If you want, ask the guys in the car audio forums. But beware they might just rag on your subs and tell you to buy new ones because they are very bias when it comes to car audio. In the end though, tell them what amount of displacement area your subs need, and they should probably be able to give you the exact dimensions of a box to build.