I recently purchased a 1965 Corvette 327. It runs great, but when I shut it off, it runs on, sputters and then eventually will shut down. What causes this and what can I do to correct it?

Wow! What a car- yeah, what he said- but understand, you will have fuel problems trying to use pump grade modern gas, most of which has ethanol- and it could be that you might need to adjust or rebuild the carb- to cure the dieseling- sometimes an old carb will continue to drip even when the ignition is switched off- in short, everything must be perfect-

Not all gas stations in the U.S. of A. put in ethanal. Yes the older engines need work to run on todays available fuel. Correct on the old heads. The old leaded fuel protected the valves and valve seats from pitting. Unless you get new valves and valve seats, you run a chance of burning valves. Have the timing checked also and get the carb rebuilt and perhaps new jets. Better or hotter plugs may be called for along with a hotter coil. My 69 does this also, but I have high compression and am running dual quads. If you have a stick, leave it in gear and start to engage the clutch when you turn it off. That will stop the engine. If your cars has a slush box, leave it in gear, give it a little gas and turn it off. That will keep the engine from dieseling or running backwards. That should help for now. My first Corvette was a 1965 327. Really loved it but without A/C in So. Ca., we traded it in on the 69. Still have it.