Hypothetical - Cheap 360 Magnum Rebuild

So, im trying to reach 300 net hp at the flywheel. Thats only 55 hp over the stock 5.9 magnum. If I build the engine back to stock with the modifications being a reground cam, headers, intake, carb, windage tray, and valve spring upgrade I think I will achieve 300. The car doesnt have ac or power steering. I was planning on getting my rebuild parts from summit racing. Yay? Nay?

Thanks for the help,

- Logan