Ordered 2 new driveshafts (requested Spicers) from girlfriends uncle back east (he owns a driveline and balancing shop) and the shafts arrived w/ Neapco joints part # 0153HD, Spicer 5-153X. I've always run spicers and I am concerned about the strength of these Neapco joints. Got a great deal on the 2 driveshafts so I can't complain plus we are planning a trip back to see girlfriends family this summer so I don't want to piss anyone off. Should I run em, change em out myself, or ask uncle to change em out?