I sold the 1995 7.4L OMC King Cobra. Now I'm looking at a 1994 5.0L (305) Alpha 1. The ? is what all should I look at prior to purchase. An individual has it. I have asked to go for a test drive on the water and will check performance, should I still do a compression check? It is a 20' Crownline- will this set up be strong enough to push it? Any suggestions will be appreciated. I don't want to act like a jerk when I'm looking at it but don't want to feel like one if I buy it. ( I don't have a marina to check it)