Your shock requirements depend on your current situation. If you are a bracket racer with a 13.0 car that dead gooks every time with stock shocks drilled to let the oil out, why spend any money? You don't need to! But if you plan to eventually eun low nines and the cage just came from the chassis builder and you are building an 800 hp motor , now you REALLY need to plan. A faster car can pull the front up high and need a very good double adjustable shock to control the landing. Other things are rear suspension. The more leverage (SSsprings are very high, 20 inch from axle to front of spring) you will need a very good shock
*f you get into the low 11s or faster. Do the math. I have a 11.17 SLR with 800 ft lbs of torque, which works out to about 16000 lbs! Of torque on the axles at the hit. I need a VERY STOUT shock to control that with a 30 inch ladderbar.