Rear Truck Chassis Opinions, box or X brace

Looking to stiffen up the frame a little on my truck with the new motor going in. Looking to put down about 700rwhp so not sure how far I need to take the Chassis. I already have an 8 point roll bar in it that will get me to 10.00, which is about where I want to be, should be able to hit 9's pretty easily. As for the Chassis, it is boxed from the factory all the way to the end of the cab then it goes to C channel. So should I have a couple of Chromoly X braces put in or have the frame boxed in. I attached a couple pictures of what is in there now. The stock brace that was over the stock tank will be taken out when I go ahead and do the rest.



This is an older picture, but shows the brace that is going to get cut out well.

Nice work. I'd X it.

Wish I could take credit, but my wallet is the only one that did anything on that.

X3 on the X brace...

Do a search, Lenny has some great pics.

Here's one:
http://i407.photobucket.com/albums/pp160/8secDart/dakotas075.jpg

Here's the thread:

https://board.moparts.org/ubbthreads/showflat.php?Number=5699139

X4 on the x-bracing, but make sure the frame is square, parallel, and not twisted to begin with.

Makes a difference which way your trying to control
movement.... if you put it as a horizontal X that will
control fore and aft(racking movement) but will do
very little for vertical movement... thats when you
need a different plane to control that force... look
at a dragster... they have a bridge network on the
side rails with a angled brace in every square to control
the rail from fore and aft racking, that whole thing
controls vertical, then they have one or two X braces
to control the two sides from racking.... the magic
work in chassis building is triangulation

Haha, So what do I want to do for drag racing?

Quote:

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Haha, So what do I want to do for drag racing?

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Triangulate ever 90 degree cross member connection in a horizontal plane.