When to, or not to rebore an engine

Aquired a 1965 Dart with the 273 ci V8. After running a compression test, finding no pressure build, I pressurized the cylinder only to find air blowing back into crank case at a fast rate. Cylinder would not hold any pressure at all. I knew the engine had serious issues. Pulled the engine and disassembled to find # 1 cylinder piston with a hole blown through it. Piston and cylinder was scored. Most of the deeper scoring was below rings where the piston skirt rides. I was hoping to avoid having to put to much money into this project but that appears unavoidable. My question is, due to the scoring in the cylinder I will have to rebore the cylinders to clean up the damage. I assume that will require that I will need to purchase oversize pistons and rings. Will there be other modifications I will need to consider such as push rods, lifters, cam, etc. Any advise or direction that could save me some money on this project , or am I SOL and facing the big pocket drain to get this puppy running.

65TRAD270