I'm sure the previous owner kept driving it around with the racket under the hood for a bit, it is possible that there are bent valves. The only way to know for sure is to take the heads off. However I would like to avoid that. I run the risk of damaging the valves (if they aren't already) by doing a compression test. But at this point, I am ready to just say eff it and just do the compression test. Maybe do it with the timing chain cover off and manually put tension on the chain...idk about that though.