She don't want to start. Once i've been running the 68 for a while and it gets warmed up - If I stop somewhere and get back in it - it turns over and acts like its getting no spark - then it will start. If its been parked for a while and is cooled down it starts right up. What could it be?

vapor lock

When she gets hot: ASAP check for AP squirt/spark from the coil wire w the dist end held 1/4" from a ground as she cranks the ign sw to narrow it down

if it's cranking at normal speed, it sounds like "vapor lock" or rather, the fuel boiled out of the bowls in the carb and you have to crank it to refill them before it will fire.

an electric fuel pump is an effective cure for this--it fills the carb before cranking.

if it cranks slowly, then your timing might be too far advanced and it's fighting against the starter as it starts to fire and push back against it.

plus hot starters will crank slower if they are worn out.