Windage tray question

Evening folks,
My parts car has a windage tray, so I am thinking I will install it on the 318 I am putting in my Duster. Of course the main bearing bolts on my engine will have to come off to be replaced with the ones that will accept the windage tray bolts.
My question, if I simply remove the 4 main bearing bolts and replace them, will I run into any kind of trouble? Or would I have to remove all of them and reinstall all of them together?
Hope this makes sense.
Thanks,
C