Magnum swap into 73 Scamp
If you are going carbureted and don't want to do a cam swap, you just need an LA accessory setup and timing cover, and an adapter for the cam snout to hold the fuel pump eccentric. If you want to keep the Magnum timing cover, just go with a decent street electric fuel pump. Some street electric pumps still require an external fuel pressure regulator. As for intake manifold, there is a dual plane M1 for sale in the mechanical parts section on this site that would work nicely with a stock engine and camshaft.