I need help with a lot of stuff...

I recently bought a 1965 Plymouth Valiant. It has a 273 cudda commando motor in it and was converted to automatic. It still has the pedals in it though and was a floor shifter to start. The parts I'm missing is the mechanical linkage and I'm not entirely sure what will be needed to switch it back to manual transmission.
I also like the look of the dart front styling over the Plymouth. I am wondering what parts will I need to switch to get the 65 dart front grille on there? Will I need the whole front cip, or do you guys know if I can just get the grille and swap it out?
I want to apologize for my writing skills and I hope this whole thing makes sense to whoever is reading it. Any help sourcing parts, or just hands on knowledge of these vehicles will be a great help to me.
Thank you for your time,
DaValCudda.