Traded a '69 Chevy 4x4 pickup for a '69 Dodge A-100 short van when our first kid was coming along; needed some space inside. O'course, I can't leave anything alone, so I replaced the stock 2 barrel on the 318 with an Offy and a Holley, and added some headers and pipes, and American style spoke mags and wide tires. I can't say it was a dog, 'cause it ran like a striped a**ed ape; but it was hard to handle on anything but a very smooth, dry road - he**, it was a terror in the rain, especially if the road was bumpy or wavy as well, or the wind was blowing.
Sold it outright for about what the value of the trade was, and we got along with one car for a while. That's about the closest thing I think I ever had to a "dog".