Verify spark as mentioned above. If you're not getting spark then go from there. Sensors should be Denso brand. Chrysler/Dodge are extremely finicky when it comes to this. Let us know how it goes. What prompted the Timming swap, Mileage....or was there an issue...

 

There was an issue the previous owner overheated the motor and actually melted the timing guides

 

I'd rec a compression test. If engine go hot enough to melt timing guides then there's likely compression issues due to head warping.
Have you checked the cylinders for coolant?

 

The guides aren't cooled by coolant.... they are cooled by oil..... That is just not a good sign.

 

I had it backfire one time but it still say -64% timing advance

 

Right about how guides are cooled heyyou, I was thinking "how hot does the engine have to get for the guides to melt?" It sounds to me like the truck was driven well past overtemp.
Backfiring is often caused by timing that is off. Are you certain that the timing marks aligned when piston was at TDC? I apologize if you already checked this, but worth double checking given the backfiring. You took a good look at the top of the head when replacing the timing chain, no baked oil?

 

So, if this truck got hot enough to melt the chain guides you most likely have warped heads and it may have jumped a tooth. Did you remove the heads or just replace the timminging components? There is a sequence that you must follow in order to put everything back in line. I just completed my rebuild and it went fairly easy for that part of the install. If you don't have the instructions go to YouTube and search for Bryan916 he has an 8 part series of rebuilding a 4.7 like ours. If you did follow Manufacturing specs then you have a larger problem. You may want to get a pick-n-pull engine that runs other wise you need to pull that block and do a complete rebuild.