sorry bro, meant to reply earlier but my comp froze in mid post
as i was saying, the deckplate mod will definately increase your power but you risk running real lean if you dont upgrade some fuel mods like the ones found at WWW.URDUSA.COM ask Gadget, he will steer you in the right direction for more power and a more happier running truck without breaking the bank. if you think your truck is fast now........

add some of Gadgets stuff in there and get a glued to the seat of your pants change in the way your truck could run.
as youve already heard, the truck does sound throatier with the silencers blocked off. but one thing i forgot to mention with S/C applications, the S/C becomes louder!

you can hear the gear whine alot more clearly and will you definately enjoy how it will sound! did you cap off the lower elbow and top front box? or just removed them entirely?