I'm having the same problem on my new 440-1 motor with Jesel paired shaft rockers with both pushrod oiling and spray bar oiling. I mounted the Moroso vacuum pickup fitting on top of the passenger side valve cover and added a baffle to help stop the excessive oil being pull into the puke tank, mine is pulling about 2-4 ounce per run. I have to drain the tank after 3 runs, if I don't it will start dripping out the puke tank push on breather
The same setup on the old motor last year would not do this hardly at all, mainly it would pull water condensation out of the same location with a different fitting That motor has a set of Harland Sharp single shaft rockers and no push rod oiling
Not trying to hijack but all help appreciated