My '52 Chevy 3100 with 216 has become almost impossible to restart when the engine is warm or even just sitting out in the warm sun. Spins over but doesnt start. Fuel filter had fuel in it but I'm not sure if I'm experiencing 'vapor lock' because in a last ditch effort I tried blowing in the fuel tank and what do you know, finally I got it started. Has anyone else had similar problems? Maybe I should also do a compression test? Thanks for any advice guys