66 Plymouth Valiant 100 Parts Interchange

Hi, hope someone might be able to help me here......

I have a 66 Val on it's way. The Hood, rear screen and bumpers are missing. Are any of these found on other models? My help me in my search knowing that these items may be found on other Mopars......

It was originally a 6 Cyl Car - what mounts are needed to install a small block?

Any help would be appreciated :-D