1966 GMC drop

[JYSaint]

OK, I've been all over the forum looking and can't find an answer. This isn't my first rodeo as far as lowering something.
I found a flip kit that is supposed to work on my truck.

How much of a drop is typical of a flip?

Has anyone ever used 4 or 5 inch front drop springs?

I want about 4 or5 front and 5-6 rear. Im not using drop spindles yet. I will when I can afford to do the disc conversion. Im a single dad raising two kids and have to buy a house. So $$$$ is tight.

Thanks for any help.