Were to find a 26" extended, double adj shock.

Questions
I have been told that a gas shock is not a good design for a drag shock?????

Also have read and been told that you need a double adj shock, because, when you want a stiffer extend, you want a softer rebound.???? Generally.?.?
I think the adj on the 9000 shock are soft to stiff together on extend and rebound.

I think on of the reason i'm have difficult time finding a 26" shock is that a true race car is slammed to the ground. NOT the stink bugs look like my is and will be again