so asked the Boss about this and here is what he said...
it is necessary for a leaf spring car to have 4-5" of front wend travel to allow the weight to transfer. with a linked or ladder bar car you dont need as much travel up front due to the fact that by changing the bar angle you effectively change the weight bias...
with the leafs all they do is plant the rear tires, the front end HAS to come up to get weight transfer...
on the landy car and norms he runs the Caltracs
i cant afford them so i run the CE's lol