I was looking into it, and I'm thinking my next mod will be a TB and intake plenum. I have the stock air intake right now. Would I still get good gains from the TB and plenum without getting a CAI? How much hp will I be looking at? Once I have that, how much will a CAI give me? I'm on a budget so I try not to waste too much money. If the CAI makes a reasonable difference, where can I get a good quality one for a good price?

 

You would still get gains without an Intake, but you'd get more if you did add one. Here is link I found that might help you decide on a throttle body and plenum.

https://mustangforums.com/m_1080031/tm.htm

 

Try to save up and buy all your intake mods at once and then install them together. Youll save time and you might feel a bigger difference if you do the two at the same time. But don't expect an oh sh$%, when you floor it. You'll ask yourself why I just dropped 500 bucks, imo get some nitrous.