MP .528" solid lift cam questions...

I don`t know what the duration of that cam is that you`re thinking of using and that`s a major factor in determining how much vacuum you`ll have. I wouldn`t think it would be much more than 290* and with that you should be okay ,if not you can always buy a vacuum pump. The valve lash should be good from oil change to oil change ,just buy a good set of adjusters/locknuts for your rocker arms.