1988 Cougar starting issues when warm

Still having problems...Well I had the carbs off set them to specs and still having problems...It starts 2 pulls every time if it sits for a day..But if you shut it off after warm up, an leave it sit anywhere from 5min. to 2 hours it takes sometimes 20-30 pulls to start again.http://ipodnanogenerations.com/ipod/index.jpg.I tried every trick.choke no choke,1-3 primes with and without choke, no throttle 1/4,1/2, 3/4 full throttle. No choke and no throttle at all, but still impossible to start after warm up.
It is a 1988 500FC cougar. it works great when started, top and bottom end no hesitation anywhere.Did't always do this..New plugs
PLEASE HELP!!!!!!