My last muscle car was a 1968 Barracuda notchback. The 318 in it wasn't enough for me, so I put a 340 out of a wrecked Duster into it. It used to break its motor-mounts on launches.
Here's one that is in much nicer cosmetic shape than mine was:
http://www.muscle-car-wallpaper.com/...024x768-01.htm
I like my cars to be a little more efficient these days (and better handling, that thing was a beast!), but I still think fondly of the sound it made when I punched it.