Chevy negative camber

I am looking to bag my 78 p30 step van frame. I am dropping a 48 Dodge body on top of it and the top of the tires will have to fit up inside the fenders when it's aired out. I have looked at quite a few pictures of c30's and some keep the wheels pretty straight and others lean them in quite a bit. What in the setup makes these differences? I will need some negative camber to tuck the wheels up in the fenders.

Here's a photoshop of what I'm trying to achieve, the camber is exaggerated, but you get the drift.

The upper control arms are normally what dictates the camber you have.

if you take a look at your top control arms. you can add or take away shims to adjust the camber. you should have a few shims in already.

I want to keep the factory camber settings at ride height. I am looking for what setup gives you the most negative camber when its aired out.

if you lay it out, and don't change anything . it will have lots negative camber.

you could go yank the front springs out of your truck and find out how much camber its got..

You can play with the upper arm mount to adjust the camber curve. Camber is adjusted with the shims. But to gain more camber as the truck is layed out you can lower the upper arm mount. You may get more positive though if you lift past ride height. And will change the BJ angle. If you raise the upper arm you will get less camber layed out. Lay it out and then adjust for what you need.

-Ryan