yj carbureted starting

Hello all. I have a 1989 Wrangler YJ with 4.2 carbureted 2 bbl.Holley 166,000 miles. I have an issue where if I drive for any given period of time and turn it off, get out for say 30 minutes and try to start it, it cranks for the longest time. I run 89 octane normally but not really sure it...