I'll grant you the opinion of "I can't drive 55" as a good song, but the original list asked for 60's and 70's music if I'm not mistaken and Sammy Hagar didn't record that little gem until the 80's.  I can still see all my frat brothers sitting on their a$$e$ in the house, totally enthralled by the newest sensation to hit the TV...MTV, and their total adoration of what we now call "hair bands" or "glam rock" and them calling it "metal".

I've recorded a disc just for driving in the Vette.  It includes the following selections:

Papa was a Rolling Stone (Temptations), Run through the Jungle (CCR), Dreams I'll never see (Molly Hatchet), Lowrider (War), I can't get Next to You (Temps), Crossfire (SRV), Gray Seal (Elton John), Bitch (Michele Branch), Heard it through the Grapevine (CCR), Celebrate (Rare Earth), Deacon Blues (Steely Dan), It's all over Now (Molly Hatchet), Get Ready (Rare Earth), Born to Wander (Rare Earth), Cisco Kid (War), Peg (Steely Dan), Kick it Out (Heart)

Not all of them are from the 60's or 70's, but quite a few of them are!

If you're leaving it up to my all time favorites, then:

Green Eyed Lady - Sugar Loaf

If you want simple length of song, then:

InaGaddadaVida - Iron Butterfly

And if you're looking for just plain off the wall:

Frank Zappa's entire Apostrophe album

Okau witha quik look over the albums yet by the turntable (yeah you heard me right... and it still works) this is what I pulled out as some pretty good top ten shots...
1. Taken care of Business - Bachman Turner Overdrive
2. Smoke on the water- Deep Purple
3. Schools Out - Alice Cooper
4. Stairway To Heaven - Led Zepplin
5. Freebird - Lynrd Skynrd
6. Workin Man - Rush
7. Stranglehold- Ted Nugent
8. Rocky Mountain way - Joe Walsh
9. Ironman - Black Sabbath
10. Frakenstein - Edgar Winter Group

Wow lots of great songs and memories to go along. I didn't see any Heart or Steve Miller songs listed. I like ZZ Top, I saw them when they were a stater band for the big named ones. I don't remimber who they were starting for but I knew they were going to be big. Another good song is You Can't Alwasy Get What You Want by the Rolling Stones. I WANT A ZZ4

I think my compiled list (In no particular order) is:

Jefferson Starship - Jane
Doobie Brothers - Long Train Running
Lynyrd Skynyrd - Saturday Night Special
Lynyrd Skynyrd - FreeBird
Led Zeppelin - Babe I'm gonna leave you
Led Zeppelin - Rock and Roll
Led Zeppelin - BLack Dog
Paul Simon - 50 Ways to Leave Your Lover
Mike Curb Congregation - Burning Bridges
CCR - Who'll Stop The Rain
CCR - I Heard It Through the Grapevine
CCR - Down On the Corner
Cat Stevens - Cats In The Cradle
Rolling Stones - Cocaine Eyes
Old Man - Neil Young
Johnny Cash - a boy named sue
Johnny Cash - Folsom Prison Blues (LIVE)

I've listed way tooo much already... but I've got plenty more favorites....

"Cats in the cradle" was Harry Chapan