Air cooled engine or Subaru? Single or duel carbs? VW pan based?
In college I had a '57 small oval rear window bug and the throttle cable broke. I pulled the shoe lace out of my Converse sneakers and used it to hold throttle open enough to drive the 35 miles home. If throttle is cable driven - cable either broke, barrel connector to throttle linkage came loose (lime green), cable shortener came loose (orange) or the throttle cable hook came off the pedal assembly (red).
Here's shot of dual carb linkage where you caoul pull the throttle linkage open to 2k RPMs with shoe string or piece of wire.
No screw in tow hooks (like on new cars) on old VW pans but a tow truck should have these big steel fish hooks they can attach carefully attach to chassis H beam. For about $100 you can buy a VW tow bar that attaches to the front H beam - provided you have another vehicle with a tow hitch.
