67 5-lug conversion + drop

[Philly67]

Once the weather begins to break here in Philly, we're setting our agenda for the truck...The plan, for now, is starting with a 5 lug conversion with discs, and a mild drop (thinking 3.5/5ish).

That being said, I am far from a mechanic, and just want to make sure I have all my ducks in a row.

-ECE Rear-end 5 lug conversion kit
-ECE 5-lug disc conversion with 2 1/2" drop spindles
-CPP Lowering kit (1"F + 5" R springs, shocks, w/ adjust. track bar and shock relocation) + CPP C-notch.

I guess my question is simple...what else is absolutely required to make this 5 lug swap and drop work?

Thanks in advance for any and all guidance!