You do NOT need the 'positioner/clips'. Save yourself $80. Go to Rockauto.com and type in '72 Challenger. Go to the brakes section and click on Disc Brake Hardware Kit. The Centric No.11763002 will give you 8 rubber seals and 2 retaining springs - for less than $12. The 'long' pins are there also - if you need them. The extra length at the pin ends is there to accept the springs - IF you use them. Leave the positioners off. As I said in my longer post, '73 and '74 Challengers used shorter pins and no extra parts, but, the seals had flanges on both ends - so would not work their way out - as on my (one-owner) '73. MOPAR did not put the slider type calipers on E-bodies but only on A-bodies. Yes, I do stand to be corrected - but all my 8 previous '70-'74 Challengers' brakes had pins - and both of my '74 Dusters had sliders'
