I personally wouldn't port it out so much...
I found oil pressure to be too low when I attempted to reproduce the photoclick
I had about 70psi max at cold start and 7000rpm with balance shafts removed and 15-40 oil
So pressure to the head would be rather low also (it was measure at the oil filter housing)
I'd say give it small clean up, I'm up to my 3rd oil filter housing trying to get it right.. I might have to play with springs if this one isn't right..