Don't pay attention to their lists. Call them and tell them what you want and they will be able to pick the right one for you.

 

I think I understand what you are asking. What degree of HD spring will translate to what degree of lift? The answer is that HD springs and High Lift springs are two different things. HD springs are made to carry more weight. High lift springs are just that - higher lift than stock height. If you choose to go the HD route to get lift, you may be disappointed to get no increase in lift and a very firm ride.

As SEAL stated, you should really call or email the company you plan to go with to let them know what exactly you are trying to accomplish. They will want to know how much lift you are looking for, if you want the ride any firmer, if the vehicle is for off-road, part-time offroad, or only street driven, and if it is for towing or not and towing what (weight wise). It is possible to increase height without sacrificing ride quality.

Check this page out:
http://www.eatonsprings.com/atqhdcoils.htm

 

I just installed a 4" lift on my '79W-150. I used Sky Jacker Springs and shocks I had to reuse my blocks but it all worked out GREAT! Here's a web page for ya. 4wheelonlin.com. You can also go to the official site wich is were i found the other site. skyjacker.com. I also found a great site for other parts its rockauto.com you won't believe how many and how cheap the're parts are. Good luck and keep pluggin!

 

http://www.ntwonline.com/78-93_DODGE..._P8397C884.cfm

everything you need!