Suspension questions for mega cab

[Mfisch]

Hello!

I have a 2008 ram 1500 megacab that I just picked up last month. I'm trying to figure out how to improve my ride but having a hard time telling if the current suspension is completely stock or not. I am attaching 3 pictures. One of what the front looks like, and 2 of the back. I'm leaning towards bilstein 5100's but just want to confirm that it'll be a straight bolt in and won't be caught off guard with anything unexpected. Also, with the megacabs I can order the same suspension that would be on a 2500 and it'll match, correct? Not sure if the blocks on the rear suspension are stock or not.

Sorry for all of the questions, with a 'unique' model it can be hard to find accurate information online. Thank you so much!

 

[Mfisch]

Just crawled around and realized those are just air bags, thought they were rubber blocks. Still looking for info on which bilstein 5100's I need. Thank you!

 

[HemiLonestar]

Looks like you do, other than the bags. Keep in mind though you may have a "1500" (MegaCab gas engine), it sits on a 2500 frame and chassis (axles, springs, 8 lug wheels, etc).