In the past, I have deleted the imported features I didn't want, and resaved the part....
You can do a few things:
1) Expand your solid bodies folder and RMB on your body and select "Insert into new part" you can choose to link the 2 together or not create any references.
2) Add both parts to the same assembly and edit the 2nd part in context. Now select the surfaces that you want to use from the 1st part and then select "Insert"--"Surface"--"Offset..." Make an offset distance of 0. you can choose to link the 2 together or not create any references.
3) Run a save as of the original part and then delete the bodies that you don't want.
There are other ways.....those are the 3 easiest ways in my opinion, depending on what your actual need is.
Wow! It works! Thank you