Need help locating air ride parts/ info

[Robznob11]

Hey guys. I need a little info here. I I'm fixing to put dom 2600 bags on my truck stock trailing arms with lower plates. No plates on top. I'm gonna run porterbuilt arms and plates up front. I need to know what size and length bolts to install the bags. Particularly on the rear. I have seen pics of bolts with a nice aluminum washer....I just need them to be strong and engage all threads top and bottom. Also with my oil pan clearance I may not be able to air out all the way in front. Where is the best place to install a bump stop and not have it damage the bag?