I've made a little progress with my fuel system. At the moment I'm trying to get it to a stage where I can run the motor in, so I'm only worrying about the fuel system from the pump forward. I have decided to go back to a mechanical fuel pump for simplicity and affordablity.

I originally had my eye on the Holley 170GPH HP carb, but after doing some research I ended up going for the smaller Holley 110GPH unit. It's not very exciting, but it's got everything i want;

• 3/8NPT fittings (-8AN equivalent)
• 6 vane
• non-regulated
• affordable ~$150
  

Holley have a calculation on their website which gives you the required Gallons Per Hour (at wide open throttle) based off the engine's horsepower;

(350HP x .5 lbs = 175 lbs of fuel
175 lbs/6 lbs = 29 gallons per hour)

My small block puts out around 450hp — so based off that my motor only needs 37.5GPH.  That means that the Holly 110GPH should give me a huge safety buffer and the 170 would've been totally overkill.

I went down to Motorsport Connections in Seven Hills to get all the plumbing to hook my new pump up. I bought a braided fuel rail kit for my carb, NPT to AN adaptors for the Holley pump, -8AN Speedflow fittings and braided line to connect the pump to carb. I also got a little inline fuel guage for the rail so i can keep an eye on things while tuning it. 

I'm still working out the rest of my fuel system, I need to have my pickup modified to take a 1/2" line and work out what fuel filter I'm going to run.