The line, "Do away with things that come on obscene, like hot rods and real clean, real fine nicotine," is a thinly-veiled marijuana reference.
Suggestion credit: Mark - Desperate Hot Springs, CA
3/5 of a mile in 10 seconds works out to 216 mph. Apparently Marty Balin just happened to see the two numbers on a newspaper page and wove the song around them. The song is more rock than lyrics, but very good rock, especially live.
Suggestion credit: Ray - Bonneville salt flats, UT
Jefferson Airplane included this in their Woodstock set when they played the festival in 1969.