idle surge 302 ford

I have a 69 Ford Torino with a 302 engine and a holley 650 carb that was rebuilt about 6 months ago.

My car just recently has developed a bad idle surge problem.

I have checked all vacuum lines and carb mounting.

The problem seems to be temp sensitive, runs good when cold but gets worse as it warms up.

The choke is not hooked up and not used because I live in SW Florida.

I have manual brake with no booster.

Car does not run rich.

Any help or ideas please?

Thanks
Rod and Alicia