Home grown or kit? Use the search function and tech articles on this site for a more complete step by step.
In any case the following assumes that you have the proper equip., talent and safety issues handled:
1)remove front & rear, stock, frame attachments for your front axle springs.
2)install new rear swing shackle frame attachment: either sleeved & boxed in the frame or a bolt & weld unit slung under the frame rail.
3)install new front stationary spring attachment.
4) mock it up to confirm the new length for your relocated spring, swing shackles (they will likely be shorter)
5)decide whether to flip your spring packs ( in whole or partial) or not.: If not then install the spring axle & steering as it was before with new bushings, u-bolts and test to see if you need pinion angle correction shimms; If flipping: relocate shocks to the front of the stock shock towers; Probably will need to address some steering geometry issues unique to your set up; install new u-bolts & hardware; have your front drive shaft lengthened.
5)Get an alignment.
Again this is over simplified. Please read through (on this web site) the articles in the "TECH LINKS" and do a couple of searches here for shackle reversal build threads. These are much more complete than the above. FYI: Decide before starting if you wish to now or in the future go SOA and/or flip you front springs. It will have bearing on how much you will do now and/or throw away later. AQnother consideration is whether to keep your old springs or get new ones. If getting new ones they should be ordered to suit the new configuration.
Best of luck