Engine Hard starting

Looking for help. I have a 1986 Gt. The issue is the car is really hard to start have to try and crank it 3 or 4 times before it starts. Run it shut it off and go to start it right away it will start no problem but let it sit for a minute or longer it struggles to start and you have to go back to trying to crank it 3 or 4 times. Fuel pressure gauge only reads 18 tried turning up the regulator but it didn’t change any thing and it runs rich at idle.
 
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