I do many of these deals a year and I trust guys like Harold and Tim if they will not regrind with a LSA change of more the 2 degrees(maybe 3 on a billet core) I trust that 5-6 degrees's is not going to be something that I'd be safe with in the long run. I did have a few factory cores checked on the campro? a few days ago and they were both 111.5 and 112 although the factory thinks they are 110 and 114 so I'd think that if your guy found the actual lsa was 111ish and they ground it 108 ish you'd likely be safe but 114 to 108 seems pretty shakey to me,you do understand that an LSA change requires grinding extra material from one side of both intake and exhaust lobes along with the lobe change. The issue is also that although the cams are heat treated before the initial grind the crust layer is only so deep and not always uniform,so any tweaks come with risk. Then you have to run much stronger valve springs to complicate things. hope things work out and figure they will.