Del, If I told you I'd have to shoot you. Oh shucks I bet I could go to jail for that. I use the average shock that is low pressure gas. Plain oil filled works fine also and that is all I used untill they sold out of them. I started using the gas filled for they are much easier to find and are cheap. The shock we use was used on the front end of chevy vans for many years. The Gabrial n81108 and Rockhill n89015. They are the shock that loewen uses on the kits they build for the newer machines. We can ship you a pair if you would like and then I wouldn't have to shoot anyone. Just kidding for you can pick them up at most any auto supply store. Have a shocking good day. Dan