Racers look here to help a newbie -Thanks

There is an *** load of science involved , but we seem to be veering radically away from the original premise.
Let's not over complicate it.
#1 New guy
#2 scratch build
#3 in the 10's.
I am certain there is a formula for this , and it is likely an expression as opposed to an equation.
But the easy answer is ladder bar.
Far easier to install ( or cheaper to have installed ) , hooks on a wide variety of surfaces without a ton of tweaking / tuning , gives you some measure of " down the road " upgradability that any leaf combination will not.
Read a book , buy the kit , slap it in , enjoy.
Bar angle and pinion angle are the extent of it.........I could delve into instant center , bar length and a bunch of other variables , but they are in the book and explained much better than I could.
And you have some margin of error / wiggle room that you do NOT with a four link. They work like a thoroughbred when they are set up , but if you miss , they can get ugly fast.