oil fill issue

[philverado]

Hi All,
I've installed a set of black wrinkle valve covers( I believe they are proform) and air cleaner onto my bone stock 305 powered '86.
There is pcv on drivers side cover and push in breather on pass side cover.
I have a problem in that both of these holes are baffled and as a result it's an absolute nightmare to fill with oil.
I recently spent 45 minutes renewing the oil after an oil change!!
Any thoughts on this? Can I modify the breather hole and drill out the baffle plate or will this make it more likely to throw oil out through the breather?
I'd appreciate anyone else's ideas or has anyone else had the same problem with these covers?
Thanks guys.
Phil.