In addition to bigbadswingdaddy's comments above, the 228 and 248 are poor candidates for increased horsepower. Other than Intake and exhasust manifolds there's not much available. Yes you can get Camshafts, but you're pretty much limited to stock pistons. And remember, stock pistons weigh 42 (forty two) ounces each. So a basic overhaul to stock specs will cost as much for a 228 as it will for a 270 or 302, but the possibilities on 270's and 302's are exciting!
Last edited by GMCFreak; 07/04/2012 3:13 AM.
