Drying out carb problem

[Joe <jw@mitre.org>]

Getting ready to put my 72 back in service for spring. Since I've had
the car, if it sits more than 2 or 3 days, it has to be cranked for
about 30 seconds to fire. Once warm it starts easily. I imagine the
float bowl is losing its gas due to a slow leak somewhere. Sound right?
What should I look for? No odor of gas, or obvious leak.

TIA
Joe