Gas pedal linkage/cable?
For a stock cable pedal assembly the interchange is 64 to 66 V8 and 65/66 slant 6 with factory air. Once you drill the factory dimples the pedal assembly bolts right in. If you can't readily locate the factory pedal, you can use later model hanging pedals - but it's not a bolt-in. Got any pictures of the Hemi residing in the engine compartment?