I was lucky enough to get 30 minutes in the right seat of an old -8 JetStar back in '88. I was a 750 hr CFI at the time, and the pilot needed a body in the right seat to ferry it from McKinney to DAL. What a cool jet...roomy cockpit, rows and rows of engine gauges, just two of us on board. I retracted the gear and flaps for him, then he let me fly it out to the practice area for some steep turns. He pulled #1 and #4 back to idle to keep the speed down. Then I flew it to DAL where he took over for the landing. Sweet landing...full reverse and he rode the victory wheelie all the way down 13L, turning off right in front of Aviall. Showoff.
If I ever win a lottery, I'm gonna go buy an old JT-12A powered JetStar for my commute to work. The 731 powered ones aren't as cool, in my book. If I can't find one, maybe an old Sabreliner 40, Lear 25, or a Viper powered HS-125. Old noisy turbojets rule!
There's a recent article in Airliners magazine about the 2 L-1329s that TWA used as pilot trainers back in the '60s. One was configured with a 727 cockpit, the other was set up like a 707. There were several cool pics in the article, check it out.