my truck has the molex type door plugs so i cant run wires to them....is there room on the door (behind door panel) to mount a crossover? any suggetions or pictures would be great...also i purchased 2 comp. sets...should i put the tweeters in the back doors too....would the sound be improved with them?

 

Yup there's room in there to fit them, when you remove the old speakers you'll see a bunch of just empty space between the outside door skin and the inside one. After you deaden it (you should do this to really improve the sound of the components) just get some double sided like body molding tape and stick them somewhere in between the door skins. That's where mine will be going, but I'm sure other members will have other ideas too.

As for the back if you have the components you might as well, they'll fill the truck a lot better than just leaving the back stock.