Do you mean a 4 link with coilovers??? IMO a triangulated 4 link with coilovers and polyurethen rod ends (not heim joints) is probably the best rear suspension on the market for a street rod. The triangulated 4 link by it's design does not require a Watt's Linkage or Panhard bar and doesn't have the tendancy to bind as does a parallel (even or uneven bar) 4 link. A leaf spring set up is the easiest suspension to set up, and also the least tuneable of any...