318 rebuild for turbocharging

Well, brainstorm on exactly what you want to accomplish with the vehicle and set the goal of how to obtain that. This post from a year ago said you wanted to make 550-600 horse. Is that still what you want? You're getting close to questionable block strength. To be reliable, I'd say you're going to need all forged internals, high strength fasteners, and some block filler. Not to mention you Need the cooling system, chassis, transmission, gear, and tire to handle it as well. It's all about how much you want to spend to achieve a certain goal.