[Ron1]

Well lets see now. He's getting his heads ported, upper & lower ported, hmmm...makes me think he wants to make some power. The odds are probably good that 6 months or a year from now he may ad some nitrous or who knows what. If he does, he won't have to think twice about his internals because he knows he has good parts.
I can only speak from personal experience, but I really hate doing things twice. I also qualified what I said by saying, IF your budget can afford it. I'm not telling him to do anything, he (I am sure) will make up his own mind once he weighs all the pro's and con's.
You have some data on this slapping & fluttering I can read?
I'm sure we would all like to read up on it..

Ron