I haven't linked my truck
yet but from all the research I've ever done on it 2"x.250" for lowers is par for the course. Why do you want to switch to a 3 link w/a panhard? gas tank clearance issues with a traingulated 4 link? if thats the case check out how Rollie did his on his 86 with the tank in the stock location.
http://www.pirate4x4.com/forum/showthread.php?t=340176
