: 72 demon.../6.....9"drums
: needs lower ball joint.......parts stores have
: to order!!
:
: i have a Just Suspension kit for a 76 duster
: disc car.
: can i swipe a lower b-joint from the kit and
: use on the demon?
: or are the lowers different for drum and disc?
: i know the uppers are bigger on disc car.

: 72 demon.../6.....9"drums
: needs lower ball joint.......parts stores have
: to order!!
:
: i have a Just Suspension kit for a 76 duster
: disc car.
: can i swipe a lower b-joint from the kit and
: use on the demon?
: or are the lowers different for drum and disc?
: i know the uppers are bigger on disc car.

: There were two different pairs of ball joints
: used on A-bodies: - upper and lower on 63-76
: 9" drum, 65-72 10x2.25" drum,
: 66-72 KH 4 piston discs.
:
: - upper and lower on 73-76 disc and 73-76
: 10x2.50" drum.
:
: ball joints do not interchange between these
: two "groupings". i.e. a 76 disc
: ball joint, upper or lower, could not be
: used on any year 9" drum brake car.
:
: Almost all 1976 A-bodies were disc brake. There
: was a federal safety mandate that required
: discs starting in 1976, however some early
: production 1976 models may have been
: produced with drums.
:
: lower ball joints for disc brake cars were
: heavy duty to accomodate the added unsprung
: weight of the disc and caliper, however they
: are the same demension as their drum brake
: brake counterparts. for example, a 67 disc
: balljoint can be used on any 9" drum
: car or a 65-72 10x2.25" drum car as a
: heavy duty lower ball joint. A 73-76 disc
: lower ball joint can be used on a 73-76
: 10x2.50" drum car.
:
: The later set of A-body ball joints, the larger
: set used on 73-76 disc and 10x2.50"
: cars are the same balljoints used on all
: E-bodies and 62-72 B-bodies. furthermore,
: the 73-76 10x2.50" A-body drum spindle
: is actually the same spindle used on 62-72
: 10" drum b-bodies..... now it kinda
: makes sense why all those B-body fans are
: scouring the scrap yards for 73-76
: A-bodies....

: ". . . a 67 disc balljoint can be used on
: any 9" drum car or a 65-72
: 10x2.25" drum car as a heavy duty lower
: ball joint."
:
: This has not been my experience. If you compare
: the bolts that hold the ball joint to the
: spindle assembly on 64 to 72 Kelsey-Hayes
: disc brake A-body and 9" drum brake
: A-body, you'll find that the disc brake
: bolts are significantly larger in diameter.
:
: You could used the "disc brake ball
: joints" with the 9" drum brake
: bolts, but it seems quite dangerous to me
: given all the movement possible.