I had a '66 Dart with a slant six, first. Never got it to run. Dad bought it out of the newspaper classifieds for <$150, then we sold it nearly 10 years later for $300.
First driver I had was a 2-door Torino with a six and a column-shift automatic. Bought for $200 my senior year in high school, sold for $600 after I joined the Air Force.
Plenty of power in that to go fast enough to get in a bunch of trouble (don't ask me how I know), with four high-school kids onboard.
I'd like to find a running slant six again ...