I would think that you are okay.Most guys don't run a pcv and usually just stick a breather in each cover,which is basically what you got.I'd go ahead and try it.Wouldn't bother me none.If it seems that you have too much crankcase pressure(usually the first place to tell is the rear main will start seeping oil) change it.I ran a bbc in my 72 truck with 2 breathers and no pcv for about 30-35,00 miles.No problems,you shouldn't either.Those valve covers are too nice to drill any extra holes into them.Hey,consider the high rpms that breather system was designed for....a daily driver shouldn't see that kinda crankcase pressure at all.Unless you drive pretty darn wild!!
