Yes you can remove BS. Note you will need to get a new 2.2 pickup and oil pan, or you'll need to weld a plate in the bottom of the 2.5 pan w/ a whole for the 2.5 oil pump to fit to keep oil from sloshing around. You will also need to drill a hole for new oil plumbing in the bottom end, not too bad though, plenty of articles how-to on here.