I would like to improve the handling of my Chevelle but I have about NO money to spend on the parts. I've read that "boxing" the Upper/Lower rear control arms help and also the front control arms.

I have Steel available and the tools and resources to make a homemade job. I have access to both a stick and mig welder and I am pretty good at welding.

I guess what I am looking for is tips and advice, or at least a place to get some. I've tried a search but all I found was people buying kits and welding them in. I want to do the job myself but do not want to screw it up.

If anybody has any advice or resources I would greatly appreciate it

Heres some info I used when I boxed my rear arms
http://www.chevelles.com/techref/ftecref16.html
You,re gonna need money,ain't no way around it.Just boxing the control arms will do little, if anything at all to change your handling characteristics.Now,if you start adding a rear bar,new springs and shocks,fatter front bar,polyurethane bushings,etc,then you'll see dramatic improvements.
If you are bucks down,your best bet would be to shop all the swap meets you can.thats where I got my 1 1/8 front bar for 10 dollars.I traded some parts I had saved for some poly bushings from a friend.What I'm saying is you can still fix up your Chevelle,you just have to be more patient and creative.