74 Gold Duster and tons of questions

Hi, i'm Chris and i just got a 74 Gold Duster 6 Cylinder. I'm from Germany so please excuse my bad english.
Just got the car and i can't wait to start working on it. The problem is, that i don't like the car as it stands there.
I already know that they replaced the 340 with the 360 in this year. Thats the first thing i want to change. This car needs a early 340. As far is i know the years 89 to 71 had the most hp. And i want to have some bodyparts changed. The picture shows what i want.

http://upload.wikimedia.org/wikipedia/commons/5/54/Plymouth_Duster_(Orange_Julep).jpg

My questions:
1. The 340 should fit in the car. I guess i need a different subframe. Do i need a different trans? It is automatic right now. Do i need a differend rearend? I have discbrakes in the front. That should be fine?

2. In case i cant find a early 340. This engine was a stroked 318 right? So are there kits to make a 340 out of a 318? Or can i get more hp out of a 360? And is the sound of the 360 the same? HP and sound are the most important things for me. But i try to register the car in Germany. So it needs original engines. I can only replace smal things. The inside of the engines doesnt matter.

3. I really like the shark tooth grill of the early dusters. So do the fit in the 74? I know that the front end of the hood is a little bit different. Does it fit, but looks like crap? Has anyone done this before? Or does a ealier Hood fit the 74? Which leads me to my next question.

4. I like the hoodscoop on the picture. I know that it's not a duster scoop. Right? But on the picture the where able to fit it on the duster, so that should be fine. I saw it on the 74 hood too.

5. I dont like this big rubberthings on the pumper. Can i fit a earlier bumper on the 74?

6. Also i like to get this black stripe on the side, which says 340 on the end. Does it fit my car? Or do i have to get the 360 stripes and replace the number?


Tons of Questions... Thank you for your patience and answering my questions.
One last question... Does anyone sell a early 340. I dont need a rebuild one ;)

Thank you very much!!