You can get ford 300 valves. For a cam, you want something that centerline is about 114° which I haven't been able to find. For ignition, you can run the msd 6BT which allows you to adjust timing retard/lb. of boost. You're going to want to look into a carb with an easy blow through kit.
I literally just took off my turbo setup. I have a Clifford intake, Clifford dual exhaust that comes up to a T3/T4 flange. I have a cheap Chinese turbo on it (just guesstimated the size), and an edelbrock 500 cfm carb in front of the turbo. It's a draw through system. I have pictures on my profile. It pushed about 12 lbs. of boost and got me about 210 horsepower. It could pull along next to a stock small block. I'm considering a twin turbo setup with custom intake and custom exhaust with side draft webers in front of each turbo. Keep me posted on your build. I'd love to see what you come up with.