Hey Daryl, right now I am doing a 2012 5.7 swap, which I would assume is close to a 6.4. As for the bolts, you will need one (1) stud, one (1) nut for the stud, and two (2) small pan bolts, or those are the parts I needed.
As for the windage tray, I used the stock and simply drilled the two bolt holes - pretty easy
Your pan, I used the the 3100 pan and the 18341 pickup - difference is your pan (3103) has the dipstick in it, mine did not. For this dipstick with the 3100, if you go with the stock block, you need to pop out the plug when you have the pan off. Also, you can use the 2017 1500 dipstick tube, o-ring and stick. This is about $65 from Dodge, part numbers: 53011222AF 53011321AK and 530021144AA.
LX versions and I believe the crate motors have the dipstick in the pan, the trucks have them in the block, the boss is there, plug inside.
For the the stud and the nut, I have extras I can send, PM your address.
Good luck - share as you go, seems we are all in the learning stages of best practices.
CP