Some suspension and brake questions

Oldmanmopar said
So what you are saying is a small 4" bolt pattern drum will fit on both these spindles. Where are you going to get the hub with the outer bearing that will work on the larger spindle pictured and still fit the small registered 4" BP wheel? The bearing race alone is almost the same size as the small wheel register. I have that same spindle here and mine is off of a 72 Challenger. Probably where you got that one from, Your car .

this is your picture View attachment 1715922987

The picture is from a for sale ad here, not mine, that I linked in my post. You can check it yourself. My Challenger came with disks anyway.

And, the outer bearing stayed the same. Only the inner bearing was different. '72 down, 10" drums used an A2 outer and an A6 inner. '73+ 10" drums used an A2 outer, and an A17 inner. Feel free to look it up in your parts exchange.

Regardless, we're going to have the information soon enough. @RevboxRyan can measure his bolt pattern and upper ball joints, they're going to be 5x4" and LBJ.

moparmat2000 said
OMM from what I understand, there were 2 types of drum setups from 73 up.

9" SBP smooth drum which used SBJ UCA and older spindle I am assuming from 63-72

10" SBP finned drum which used LBJ UCA and special spindle made from 73-

I got one set of arms off fakebook off a truk lagoon rusty 74 slant sux duster with 10" finned SBP drums. They are BBJ

The other set of BBJs I got out of my local wrecker yard. It was also a 74 valiant slant sux with 10" finned drums.

Wheel studs on the valiant were also smaller than the 1/2" studs on the 5x4&1/2 drums. I think they were 7/16" studs

After the new 10" drums were implemented in '73 the 9" front drums went away. The 9" rears continued. It's in the TSB I posted and linked. I'm sure there was some carryover, but the TSB was published after the changeover happened.