I did a search on this and dident pull up any thing on the 5 leaf pack. i was running the four leaf pack on my 98 taco,they are nice and flexy but i am not getting the lift i need.I am already running a three inch block and have droped the perches down about two inches.I also have 6.5 inch shackles.I thought that an AAL might do the trick but isent that pretty close to the 5 leaf pack?{or so i thought} So i went to the local dismantlers and Picked up the 5 leaf pack,put them on and it seems to have solved the height problem but when i pulled up on rudzuks 38 inch boggers{im also running 38s} it dident even flatten the spring out{let alone get a negitive arc}....way to stiff!Im concidering going back to the 4 leaf pack and 1:trying the AAL but think it my react pretty much the same as the 5 leaf, or 2: doing a four inch block with a traction bar,but my rear axle is a dana 60 and is a cast pumkin....i hate welding on cast!My Questions to all of you are 1: have any of you ran a chevy 5 leaf pack 2: or a 4 leaf pack with AAL 3:How about a traction bar on a 60 with a four inch block? 4:what about mixing and matchinh different leafes? I would appericiate any positive input on this. Thanks Robert in sacramento