RT

RT, a photo by William 74 on Flickr.

Back in ye olden days, you could buy your family sedan in a number of configurations, from mild to wild. Usually the manufacturer had a special designation for the top and bottom of the lines - the base models would have some sort of fancy name (if anything), and the racy ones would get something...er, racy. GM had it's SS models, Ford the GT, AMC liked to use SST, and Plymouth used R/T, which meant, of course, Road and Track. This one's a '67 or so Belvedere.

A/FX

A/FX, a photo by William 74 on Flickr.

Factory Experimental was an offshoot of the Showroom Stock class. These were usually cars with prototype engines and other equipment combinations that weren't available from the factory. A/FX cars were even wilder, featuring altered wheelbases that pushed the center of gravity around for better traction. Wild cars.

Race on Sunday, sell on Monday

Super Stock, a photo by William 74 on Flickr.

Super Stock drag racing got it's start in the early sixties, and was a very popular class for about a decade, mainly because the cars were the same as the ones you could buy at your local dealer. Sort of.

Factory SS cars were in fact available from the dealership, but they were usually special order only and frequently were stripped out base models. The Plymouth Belvedere pictured here had thin van seats (they were lighter than a bench), no back seat (it's heavy), no heater or air conditioning (it's heavy), no radio (it's not heavy but you can't hear it over the engine anyway), no sound deadening (it's heavy), and no hubcaps (because you're likely to get rid of the wheels anyway). In short, they weren't nice places to be for more than a quarter mile at a time. Modifications were few, and limited mostly to safety equipment.

I have no idea if this Plymouth was a genuine Super Stock car back in the day, but it was very convincing if it's a clone. Everything was correct, and it looked and sounded great.