Center / floor installations like the one pictured are relatively rare on pre-2005 Double Cabs. Most folks opt for a behind-the-seats approach.
Also - I'm not sure you can get adequate air space for two 10" subs unless the enclosure is huge - like TacoWithCheese's setup illustrated in this archive thread:
http://www.customtacos.com/forum/showthread.php?t=110112
Also - I'm not sure you can get adequate air space for two 10" subs unless the enclosure is huge - like TacoWithCheese's setup illustrated in this archive thread:
http://www.customtacos.com/forum/showthread.php?t=110112