I love that movie. After trying to find it for years on TV, it was hit & miss and then usually missing the beginning or end which doesn't work for this kind of movie.
Then I found the 2008 remastered version in my library. Included (on paper, not a DVD bonus) was the script (that's a short read), a reprint of the Rolling Stones movie review from 1971 and I believe an interview with the Director (Monte Hellman). On the DVD was an interview with The Driver (James Taylor) who has never seen the movie as that is his policy on anything he does; doesn't look back. Google movie reviews of Two Lane Black Top and find some interesting reading.
Myself, I could identify a lot of me in the movie but let's say several notches below. I spent many hours trying "new jets" or new dwell angle or new valve lash and then sometimes driving around in my Challenger for hours late at night looking for a race. But I never took it to the road and made a living off it like these two guys.
Basically, if you didn't like Easy Rider, you probably wouldn't like TLBT. It's an end of an era type movie; the world is changing and these two guys are free to do what they love with no ties to anybody or anything. The end was controversial at the time and if you understand the deeper meaning of the movie, it makes sense. If you need an ending neatly spelled out for you, you'll hate it. But you have to watch the movie, all of it at once and ideally not interrupted, to take it all in.
The movie was a flop when it was originally released and has sense turned into a sizable cult film. I like it a lot more than Vanishing Point and I could ramble on about hat movie also. If VP had been directed by Monte, it may have been a better movie as the theme wasn't half bad.
There, that's my review.
Look here also:
http://en.wikipedia.org/wiki/Two-Lane_Blacktop