All I use is the Super Stock leaf springs. No pinion snubber and I made sure the front part of the springs are clamped. My 63 hooks fine like that on 9" radial slicks. I have seen alot of guys run pinion snubber which to me can be kind of a bandaid to help hook if the springs are worn and not working. My car hooked no better or went any faster with a pinion snubber so I dont use it since I run the 3400 lb SS springs. I have not seen many Mopars ever use traction bars as they usually dont work so good on Mopars and thats why Mopar came out with the pinion snubber. But if your SS springs work right you wont need any additional parts on it just the SS springs. Now Cal Tracs work great but they work best using the mono spring that comes with them from what I hear. Ron