Loving the new shocks

Although I can now feel everything through the pedal. Need to address a driveline issue that has been there since it was bought.
Transfer is/has been making a rub or worn bearing noise at low speed when cold. Mainly after slow takeoff during coasting.
Have changed oil and it backed off for a minute but has gradually come back as oil thins.
I looked into getting a kit sent over to replace it but the shipping is a killer

so I approached a local Chev parts store and they told me for $1000 I could have one off the back of a trans that had come in on a crate motor. They will guarantee anything broken but not worn so if I go down that track I may find myself in the same place.
I reckon on buying one putting it in and then pulling my old one down and seeing what it needs,addressing its issues and keeping it to the side as a ready replacement so I dont end up not being able to drive awaiting parts from the states.