I'm about to start going back together with my Merc flathead 8CM. Will have minimal clean up, not trying to hog it out and stroke it. Pistons will be at most 30 over and bearing might be 10 over. Staying with the 4" Merc crank. and original rods. It will have Offenhauser heads and intake, running two Stromberg 97's. Question is should i reuse the original cam, there's nothing wrong with it or would an aftermarket cam be worth the money. I'm not trying to make a race motor or squeeze out every horsepower I can. Just building a good cruising around car with its original engine. Which by the way, no one has ever touched the inside of since Ford built it 51, until we torn it down last weekend.