Let me ask, more camber in a turn...camber gain,,,,etc etc. Why would you want that, for racing? I think many street car owners get lured into this when they have no intention on autocross or other forms of competitive racing, stock, rebuilt suspension is great, for the daily cruiser/car show guy.
I agree - the stock suspension is fine for a daily cruiser/car show guy. However, if you're going to drive your car hard on twisty roads, correcting the front end geometry pays a lot of dividends.
The Guldstrand mod, tall ball joints or tall spindles improve the camber curve for first generation F bodies. Improving the camber curve has the important effect of maintaining a larger tire contact patch when the front end is loaded in a turn. Maintaining a larger tire contact patch in turn both improves the speed you can carry through the turn and saves the tires. Take a look here at the tires on a '68 Camaro that ran at Streets of Willow, with no camber correction:
Here's the same car from a distance:
Now look at two cars with camber correction:
and the car above without:
Notice how the top of the front tires on the cars with camber correction are tucked much farther into the wheel well than on the car without camber correction? That translates into speed and safety.
So, if you're cruising to a show, there's no need to do anything to the front end; if you're driving your car hard anywhere - street or track - fixing the front end can both improve the handling of the car and save a lot of money in longer tire life. The chunking in the pictures above is simply an accelerated version of improper tire wear over several thousand miles.