hey guys, i want to do heads and cam but i'm having a leak down compression test done first on the block because its got about 110k on it. what would be a normal percentage for a motor with that many miles on it and what would be the cutoff point where it doesn't make sense to do the top end without doing the bottom end also? i know a fresh motor is about 12 to 15 percent leakdown. any thoughts would be appreciated.