Are these genuine Spicer Dana USA factory OEM parts? Are they zerk fitting lubed or sealed (lubed for life) type parts? Thanks

• Does this kit work for front and rear drive shafts? Thanks, Tim general
• Hi! <br>Does this kit apply to the 78-79 driveshafts? front and rear? <br><br>Thanks general
• Does the constant velocity yoke in this kit come with the little spring? Is that spring absolutely necessary? I lost m general