MP sells an M1 single plane intake that uses stock injectors/fuel rails/throttle body, it's under $500.

hughes sells a modified eddie air gap magnum manifold to accept stock components, too

the magnum single plane carb manifold has bungs cast in, they'd just need to be machined, and then stock style injectors/fuel rails will fit....then an elbow that bolts to a square bore manifold could be used to then run a large single (hemi/4.7/LS1/ford mustang style) throttle body.