I have done all these modifications to customer cars that the owners wanted their first gen cars to do some corner carving. After spending thousands of dollars on suspension parts and big brakes they still are a first gen F body and will never handle like a modern car. They are a little better but still body roll and push thru the corners. I have been able to get 3 degrees of caster with stock control arms using offset upper shafts. at this point you should be installing solid body bushings.