uh...why would you wanna use the extremely soft OEM flattened out spring pack to put under the front which (correct me if wrong) has a higher sprung weight (than the rear) especially with a built Dana 44, bumper, winch, etc; up there...?
Me thinks you got some reading to do before you start tearing off the IFS parts. There is a ton of guys on here that will help if you get stuck. Also, check on nissan4wheelers.com.
Good luck, happy wheeling!