Hi, congratulations on the Imperial purchase! Now for the not so good news......just about everything you mentioned above except for the engine and transmission is unique to the Imperials. There are some parts that will work from 1967-1973 models and there are other parts that seemed to change with each model year, brakes being one such item.

Wheels, 15x7 (maybe x6) with a 5x5 bolt pattern. Not an uncommon bolt pattern by auto standards, GM used it on mid-and full size cars, but it is an odd one for Chrysler products. Could be changed to 5x4.5 if axles and brakes were swapped out with regular Chrysler Newport/New Yorker parts of similar vintage. You need to check and see what is on the car before you get to far into this adventure.

Bad news is that 1967-1970 brake rotors are nearly impossible to find. The good news is that it is (should be) a rotor bolted onto a hub so you might be able to upgrade the brakes with a different rotor and have a new caliper adapter made for better caliper choices. There is a Toyoda Supra rotor that is very near factory dimensions but does require the center register to be machined larger. Check www.imperialclub.com and here http://www.imperialclub.com/Repair/Brakes/mike.htm
for info.

Just about all the suspension bushings are Imperial only and can be difficult to find. Some of them cross reference over to other vehicles but you need to know what they are to find what you want.

Oh, power from the engine, 350HP I believe was advertised.

I'll try and help you with what info I have.

Bob