MAKE SURE you take your time... if you are doing the welding, make sure you clean all areas before welding... it is best to remove all parts to work on them... your welds will be much more accurate and will end up stronger...
do yourself a favor and get all parts beforehand... it is a pain in the testis to start the project and not have everything... brakelines, Slip Yoke Eliminator, shocks, everything... It wouldn't hurt to go with an upgraded axle from the start
I could go on all night on the parts you'd need, but if you have any questions on specifics, or even a general area of the vehicle, please ask... we're all willing to help the most we can, which is to say... LOTS