Currently using vanilla clover install can I just replace EFI with Open Core and expect it to work?

Getting to grips with moving to open core. Is it just a case of installing correctly configured files onto EFI partition? Aka can I safely leave OS installs alone?

I have MacOS and windows on separate drives. It’s a vanilla clover install that’s currently works. Mac is Mojave.

Z390 / i9 / rx580 / ssd / 32gb