My dad has homemade cal tracs on his car (pic below) with QA1 adj shocks, trans-brake and 10.5 tire. 1.43 60 foot times. They work great for him. My duster, running high 11's has the same bars and will damn near hook up in the rain.
How do the Caltrac brackets fit in the spring bucket on either side of the spring eye/bushing? What thickness is the steel? What keeps it from binding. In other words how do you tighten the spring eye bolt without pinching the bracket? Does the eye bolt wear the aluminum spring bushing?
Cal Trac's will work as good as a 4 link on cars making 1000 or less horsepower but, you have to get the whole package. Cal Tracs, Split mono leafs and adjustable shocks. For example; I installed the below system on my 65' Belvedere and I picked up a 1/10th in my 60 foot times after dropping from a 4.88 gear to a 4.30. Remember, the whole package......
The springs in both mine and my dads cars are just plain old stock worn out leafs. Both sets have another leaf added just to get the ride height looking good. For the added leaf, we just took an old leaf pack, removed the main leaf and cut the ends off and added them into the leafs in the cars. Worked out perfect, and sat with a nice stance. I've heard that using S/S springs and cal tracs together is a bad thing, I believe they counter act each other, but not 100% sure, I'd have to ask my dad, he's the chassis guy, not me.
SS springs will not work with cal tracs. The springs are from calvert racing also, they will set you up with everything after you have given them about 20 data points on your car, Mancini took my order..... The 60' time is 1.48, and the 1/4 mile time is low 10's, weight is 3800 Lbs. I did not tub the car, it was done a long time ago along with the 2X3 frame. I could have used ladder bars but, they don't perform as well as the cal tracs do.