They are diff otherwise they wouldnt list 2 diff part #s.
You must have got the 3600lb axle setup. They have a 3800-4000lb balljoint that Im sure is a bigger diameter.
But great info otherwise.
76 B300
RAYBESTOS Part # 5051013B Service Grade
Front ; Lower; 3600 Lb Front Axle; Vehicles With 4" Inner Tie Rod Ends; Press In Type With Wear Indicator

$12.87
Add to Cart
RAYBESTOS Part # 5051008B Service Grade
Front ; Lower; Vehicles With 14" Inner Tie Rod Ends; 3800 Lb Front Axle

$13.44

94 B350

RAYBESTOS Part # 5051013B Service Grade
Front ; Lower; 3600 Lb Front Axle; Press In Type With Wear Indicator

$12.87
Add to Cart
RAYBESTOS Part # 5051008B Service Grade
Front ; Lower; 4000 Lb Axle

$13.44

Also on the dakota Spindles its Dropped spindels that you use and its not that big of a deal to use them.
https://board.moparts.org/ubbthreads/show...part=1&vc=1