Say I rip out my engine and drive train from my Ralliart. I'd be able to put....say.... an LS engine in it right? then just hook up the driveshaft to the rear diff right (of course, I would need to find the correct length,)?

Also, since my car doesn't have a clutch pedal, I'd just have to go to the junk yard, and find a clutch pedal, and bolt it in my car right?

I know it's not that simple, but this is all hypothetical.