When to add shock relocators?

[Camaro_nut2001]

Got a question. How low can I go using springs and drop shocks without having to use shock relocators? I just bought 3" lowering springs and shocks for the front and 4" lowering springs and shocks for the rear with a new Trac Bar in a kit from TruckandCarshop. The P/O heated all four springs on my 69' so I don't know how low it is now but I do know it has factory shocks on it and the left rear shock is real weak if not blown. If I can use this kit without shock relocator's it would be great but if I have to use them then I will put my buddies on hold and order them. I will do whatever ya'll recommend.Here is the stance of my truck now with 275/75/15 rear and 255/70/15 front. Also, it has a BBC in it.