A few things to consider. If this is for the street I vote for 4 link or leafs due to the one fact. Ladders do not allow for any articulation.
This is very hard on the car.
As for 3 inch exhaust out to the bumper. It's a challenge with all 3 set ups. Inboard leafs have 3 inch less room to the gas tank, than original and the bar set up needs a panhard bar.
I run with 3" exhaust to the bumber in my 69 Dart with mini tubs and a 11 x 29" slick, Caltraks and mono leafs. I would suggest you look a cars you like and barrow ideas from them. I used TTI tailpipes and modified them a little
