I've been hearing more and more that they aren't really necessary...

 

They really aren't unless you were doing some intense racing, I have subframe connectors welded in. I will say I can all but jack up 3 out of 4 tires from a single jack point, that's how stiff my car is.

 

Not really necessary, most say , but I put the Steeda 3 Point Frame Rail Braces on mine
just in case...LOL

 

If you want to deal with wheel hop, you need at least LCA's. I was getting a lot of wheel hop and this last weekend just put LCA's in and the wheel hop is now gone. The link for them is below and it's totally worth the 100 bucks.

http://www.americanmuscle.com/2005-p...ling-arms.html

As for a UCA, I havent done that but I believe that it would handle axle rotation which should ultimately help with wheel hop as well.

For the frame flex, you can get into stiffening, but I can tell you that my old mustangs had a lot more flex than the 06 and 10. That's why I dont think you need to make the frame more rigid unless you really get into racing it, and then it becomes kind of specific beyond my knowledge and skills.