Properly matched components might help more...
What I'm saying is it looks like you have the right calipers, the brackets have been butchered to allow the bracket to bolt to the early spindle... The current (66-69) rotors are thinner than the 73-76 A body rotors & the offset is wrongSo you’re saying do what you said on the last page, buy 1973+ A body spindles, caliper bracket, rotors, splash shield and lower arm/ball joint. Hopefully the brake calipers I can use again. What makes the 1973+ A body parts special?
Or what if I just get a complete package like this from POL?
1962-74 MOPAR, Dodge, Plymouth Disc Brake Conversion, Stock Height Spindles
MBM High Performance Brake Conversion Kit
What I'm saying is it looks like you have the right calipers, the brackets have been butchered to allow the bracket to bolt to the early spindle... The current (66-69) rotors are thinner than the 73-76 A body rotors & the offset is wrong
Personally I'd rather use OE 73-76 A body spindles and rotors since I see a lot less threads about OE brakes not working than I do threads about aftermarket stuff...
Are you 100% sure you had the mounting bolts properly torqued? I would think the paint would show more damage around the hole if so. This could possibly get missed if a project stretches over several days or work sessions. I'm thinking specs are 80-100 foot pounds, but you should double check your service manual. Body weight on a short wrench is unpredictable, best to use a torque wrench.Tightened all the bolts again and really leaned my body weight into the wrench, and used red loctite.
IMO.....for what it's worth....the slider type calipers work great....but stay away from from the aftermarket / rebuilt calipers using the phenolic pistons (sort of a black hard plastic like material)....which I believe were developed to eliminate the metallic pistons from gauling / sticking / leaking in their bore......which did not fix any issues but created many.....like sticking, leaking.....stay with the traditional metallic pistons.Brackets that bolt up properly & mate late calipers to early spindles... Cool!! Not saying I'm 100% comfortable with using mismatched parts but that's a big step in making it safer... So the bolt fell out cause it wasn't torqued? I mean, loctite is good but theres a lot of brakes out there that never got any loctite & they don't typically shed bolts....