429 Dual Point distributors

which Ford year/model/ applications used dual point distributors in the 429 series engines? anyone have casting/part numbers?
TIA

Don't know the casting number right off hand, but my guess would be 69/70 Boss 429, 70/71 CJ & SCJ and honorable mention would be 71 Boss 351 (they fit big blocks as well).

https://www.ebay.com/itm/275773445543?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=275773445543&targetid=1645685073248&device=c&mktype=pla&googleloc=9027791&poi=&campaignid=20133407470&mkgroupid=147476396765&rlsatarget=pla-1645685073248&abcId=9312979&merchantid=113750948&gclid=Cj0KCQjw4s-kBhDqARIsAN-ipH3XHFNUxt6z5ZK3MqlebuuTlLnOuqckNuqfwWmcpRkeiwxkgvg5bCYaAnZXEALw_wcB

^ C9AF 429 Boss  1227  9A429

https://www.ebay.com/itm/285065644829?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=285065644829&targetid=1645685074728&device=c&mktype=pla&googleloc=9027791&poi=&campaignid=20133407470&mkgroupid=147476396765&rlsatarget=pla-1645685074728&abcId=9312979&merchantid=113750948&gclid=Cj0KCQjw4s-kBhDqARIsAN-ipH3glzL4RmfYc0ky3IPIeB4vEmfnIjzAiWg5gZtUhyG5lnNjtW4THacaAvj0EALw_wcB

https://www.ebay.com/itm/275886795108?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=275886795108&targetid=1645685073248&device=c&mktype=pla&googleloc=9027791&poi=&campaignid=20133407470&mkgroupid=147476396765&rlsatarget=pla-1645685073248&abcId=9312979&merchantid=113750948&gclid=Cj0KCQjw4s-kBhDqARIsAN-ipH31kvv2wS9XQntPFXhzygpFvP8Tzb8Nt-926ptD1o7Jx7jNLhg8i4gaAi51EALw_wcB

^ D1ZF 351 Boss The First one has a Vacuum Advance. Not Sure about the First Link, What he has Going?

http://429mustangcougarinfo.50megs.com/ignition.htm

^ 429SCJ/CJ Info

Notice Only the 4 Speed 429CJ/SCJ's got them.

Just get an old Accel if you want Dual Points. In my opinion the extra set of points is not needed on most BBF's unless you are going to spin it past 6,500 Rpm's and even then they make stiff spring points. You may pick up a little more Dwell time but I doubt you will see much performance gain except with a high winding small block.

My 70 429CJ/4 spd Torino Cobra had one. Swapped in a Unilite and that dual point sat in a milk crate of stuff for about 40 years until a buddy of mine was restoring a Boss 429 Mustang. He's a transmission guy and has helped me out a bunch over the years for peanuts so I gave it to him. He let me take that piece of history for a quick spin last year. Awesome experience!!!