I have the bent coils can I use the straight boot one?

Which engine?

2007 lariat 5.4 amazon said they fit exactly. But I read you need to use bent boots if you have them

You should be using the straight boot ones

Ok I'll order the ones from Amazon and hope that's the problem

You also need to replace all those plugs. Motorcraft SP-515, even the one you already changed on 3.

Yep... start with 8 fresh plugs and 8 fresh COP's