i am currently in the middle of putting a 518 trans in my 89 dodge d250 2 wheel drive. i lucked out when i found a complete donor truck with driveshaft and all. so im almost done when i go to see if my (new to me) one piece drive shaft is gonna fit. it looks to me its gonna fit but with very little room for the slip yoke to slid in much farther. so how far does it need to move when the suspension moves up and down?