I know a bunch of you have more than just antique flattie mopars (nothing wrong with em, I've got a B1B and love it), so let's see em.
Here are some of my other rides to get the ball rolling.
My '73 340 Duster. "Mildly" Modified 340, Manual Shift 727, 8-3/4" Rear with 4.10's and a Spool
My '74 Duster (also the reason I use the nickname 74Dusted)
The 73 was my dad's first car, I bought it from him after it sat untouched in the garage for 17 years. It was the car that made me love Mopar A-Bodies (Dusters, Demons, Darts), I have fond memories of riding in that car when I was little and it was the reason I went out and bought my '74 so I could have my own. (didn't get the 73 until years later).
I don't know what's been done to the 340 in the '73, but it is FUN. My dad says he doesn't remember, and then laughs like crazy.
My '74, I picked up when I was in my teens, back then it was completely stock and still had the original 318, 904 Torqueflite and 8.25" Rear with 2.45 ratio gears. The same night I brought it home, I noticed it needed new Freeze / Expansion Plugs so I pulled the engine out... And thats when things went downhill in a hurry. LOL. I decided while I had the engine out, I might as well upgrade to a 340. If I was upgrading to a 340, might as well install a Manual Shift 727 Torqueflite, if I was going that far, might as well install an 8-3/4" Rear with Sure Grip.
I drove it as a Daily Driver each summer from 2006 - 2011, every winter I pulled the engine out and upgraded it further and further. It got to the point where it was putting down enough power to break motor mounts, and I had to chain the engine down. Toward the end, it had reached the point where the whole car would twist under heavy throttle. Slam the throttle to the floor and you could feel the seat move as the floor twisted.
When I stopped driving it in 2011, It was because I decided the car still didn't have enough power. So I pulled the old 340 (last picture is the old 340, with a 6-71 blower sitting on top to test fit the new hood) and started building a brand new R3 6-71 Blown 340 for the car. I decided the 727 wasn't going to survive behind that, so out it came and in went an 18-Spline "Hemi" A833 4-Speed (with an Offset Console Shifter Adapter & Pistol Grip Shifter). It was immediately obvious the 8-3/4" Rear would die a miserable death too, so I built a Dana 60 for it. Then came the obvious fact that the engine would tear the car apart, literally. So in went Torque Boxes, Subframe Connectors and a Rollcage is in the works as well.
The original plan was to tear the car apart in 2011, install the new motor and drive it in Spring 2012. Here we are, Spring 2014 is almost here and the car is still in pieces.