I just completed a SYE for my 208 case and sourced a new driveshaft from a '91 3/4-ton Suburban. It is about 1" short. Is this a big deal? When the truck sits static, the front of the splines are right where the seal should sit. When I let the rear end droop, it pulls out about 1". There is lots of spline inside and the driveline is smoother than it's ever been before. I was planning on just running it as-is without the spline seal until I get around to having a driveline shop put in a tube 1" longer. What do you think?