Both my airbags blew on my 70 Chevelle, and I was going to order replacements from Summit. I noticed there were two part numbers for Chevy passenger cars. The first one, the air bags appeared longer and skinnier, the second one appeared to be shorter and fatter. I had previously installed the shorter, fatter ones, and they blew. They appeared to be too short in the springs, and did not seat on the protecters at the bottom of the spring perch. Which bags do I need?
TIA, Kevin

TTT, I'm sure someone knows the answer.

Check out this Airlift (http://www.truckspring.com/airsprings/airlift/app/chev_cars.asp) site

Kevin,

I haven't used air bags in a long time, but this is what I can tell you from my experience. When I purchased my Chevelle, it had the longer type air bags installed. One of the two was tore, so I moved the good one to the other side to calm my wheel hop. After the second one blew, I purchased the shorter stlye, which were orange in color. After a year, a friend of mine told me to spray them with silicone spray every month. They never blew out, I still have them in the garage. I ended up putting on ladder bars, and just didn't need them anymore. I believe that either set will work fine. The taller ones actually give a bette ride. While the shorter ones control the spring action better. They stop the spring from compressing quicker, in my opinion. Don't fill them to their rated max, you don't need too. If they rate them to 32 psi, only fill them to 25 or 26 psi. A psi of around 25 will clam down the wheel hop, depending on your tires and HP. If you plan on taking a long cruise, drop them down to 15 psi or less. Before installing them, clean the inside of the springs, and repaint them. Taking out the spings is easy, so I would take the time to do so. Make sure to spray the bags with silicone on a regular basis and keep them clean. Most kits come with two connectors, so you can fill each bag with a different pressure. A great idea, if you plan on racing your car now and then. If your thinking of ladder bars and drive the car alot, I would suggest against it. They are great, but will give you a much much harder ride. They are also much harder on the axles and bearings, especially over time. Again, this is just my opinion, I'm sure other may disagree.

Hope this helps,
Fred

Mojo, Fred,

Thanks for the responses. I contacted Summit and they were able to give me the right part number. Airlift website gave the right part number too. In the Summit on line catalog, the right part number for the Chevelle was neither Chevy passenger car listing. It was listed as Buick/
Chevy/Olds... etc.

Thanks for the tip about the silcone spray. The springs are new, so they are clean.

Kevin