Ready to do springs

[PracticeImpractical]

Alright guys I made a post about lowering springs a while ago, and now have some cash thats burning a whole in my pocket so i would love some guidance on how to spend it. Its a 72 3 on the tree conversion with a 350. I bought it with the front springs cut (unevenly) and the rears heated and squished. I love its stance now but i want to drop it the right way. I would like to level the truck out with lowering springs and then possibly drop the front with spindles when i run into more cash. here is my rant of questions, and i appreciate the help in advance. Thanks guys

-to level out the truck am i correct in thinking I need to lower the rear about 2 more inches than the front to make it level?

- how low can i go with lowering springs with out cutting or changing too much else? I would like the truck about as low as it is now, the only problem is my headers are about 2 or 3 inches off the ground.

-Should i buy better shocks because of the lowering springs?

-What brand would you recommend and where should i buy them? i could spend upwards of 3 to 400 but i would rather not.

What else should i be asking and what else do i need to know?