Rather than blocks in the back, given your lack of funds, do a search on there for "bastard packs". You can take another set of leaf springs and steal some leaves from them and make up a custom stackup of leaves.
Front coil springs are fairly inexpensive so I would just buy them or check on the want ads here to see if anybody has an old set.
The newer models have lots of problems with vibes if you don't run a SYE. A well done hack and tap will be just fine. Half the guys I run with are running hack and taps and they do the hardest trails around.
Any thing over about 4-5 inches of lift will yield one crappy ride if you don't go drop brackets or long arms, but I know lots of people who have run it that way for years. Ideal....NO.
Remember you are going to have to go longer shocks as well. You will also need to extend your sway bar links.