Just on youtube viewing racing vids.
Some of my favorites are the Killer B's, class B rally cars, truly the hayday of rally racing. Only lasted a couple years, deemed too fast and dangerous, but a lot of really really badass cars were produced.
Probably my favorite is the Lancia Delta S4. 1600cc turbo AND supercharged, 900hp AWD, 0-60 in something like 2.6 seconds.