I’m having my 350k engine rebuilt out of my 1981 ss170. Is there anything I should know going into it? Cam recommendations? Rebuild the stock heads or is there a better option? The boat is used as a runabout and not much for towing. I’d love to get some more speed out of it. It was topping out at 45mph, but ever since I’ve had it, it has always had low compression in one cylinder.