new leaf springs


i am buying new leaf springs all around for my daihatsu rocky 1986 2.8 non turbo but i need to know this:

1. how many leafs are per tire

2. can i have 2+1 on the front left and right and 3+1 on the rear left and right or 2+1 or again 3+1 all around with some rancho shocks rs5000.

almoust forgot all leaf springs are going to be curved to give it about a 2 inch lift. please advise. thanks