Keep them off the concrete and if you can keep them at a constant temp.I keep mine in the casa.
The set on my uncles dragster right now have 4 passes on them but they have been on the car in the shop for 5 months and there toast,dryed up and hard.
Sweet Chad,I looked at your site to see if you had them.I am going to call the guy tomm and give him one more chance.he was susposed to order me a set 2 weeks ago but hes being shady and im tired of waiting.I need 2 sets one for my truck and another for a 94 s/c stepside chevy.