Classic cars (typically pre-1985) often have carburetors instead of fuel injection, points-and-condenser ignition instead of electronic, mechanical fuel pumps instead of electric, and other vintage systems that modern techs aren't trained on.
Vapor lock is a common classic-car roadside issue — hot weather causes fuel to vaporize in the lines before reaching the carburetor. Engine quits, restart is impossible until everything cools.
Battery jump procedures are simpler — no sensitive electronics to damage — but the 6V systems on some pre-1955 vehicles aren't compatible with modern 12V jump packs.
Tow procedures for classics often require flatbed because of clearance issues, fragile bodywork, and the absence of tie-down points designed for tow straps.
Some classic-car insurance includes specialty roadside that's better than general roadside services. Check your policy.