have a sbc 355 with a slayer 600cfm carb. this thing starts fine in the morning but doesn't like to re-start after it's been driven for awhile. Starter will turn the motor over and will eventually start but have to crank it over 2 or 3 times before it'll fire up. Seems only to have started behaving this way since the weather got colder. Any ideas on how to solve this would be appreciated.