Not tryin to scare the hell out of ya.....BUT. I would pull the side cover to check the lifters. There's no telling what the last guy(s) did to a motor. Just bad personal experience, was having trouble getting valves adjusted right, finally pulled the cover and found a PO had put three solid lifters in there with the rest of the hydraulics. Needless to say i'm in the middle of a cam/lifters/pushrods replacement now.