My question is, my book shows that 442 and w 31s had reinforcement bar of some sort and I was wondering if its necessary and where can i find them?

Mine were not on the car when I took it apart along with the rear sway bar (Both were replaced by ladder bars)

 

http://www.thepartsplaceinc.com/ocat..._Keyword=brace

the braces are worthwhile to prevent flex between the frame rails and the crossmember holding the springs and upper control arms.

 

You can get factory original style,or there is a selection of aftermarket tubular style.I put them on everything.

 

tube I assume are stronger but more money?

 

The Edelbrock version is one of the cheapest of the tubular design,yet very nice.Mine are the Hotchkis.

 

Won't find a better deal than this:
http://www.ebay.com/itm/68-72-A-Body...sories&vxp=mtr

 

Edelbrocks...

 

looks nice

 

non race application bilstein or monroe?

 

I really like my Edelbrock IAS shocks. Tried others.

 

I'll check them out, I'm about to do rear suspension.