Advice needed.
I am experiencing hard starting with the 1956 235ci engine in my 1952 Chevy 1/2 ton pickup. It starts quickly cold and runs excellent but when I've driven it to normal operating temperature (180) and shut it off for 5 to 15 minutes it starts hard. When I shut it off and try to start it immediately it starts right up. The starter turns over the engine properly but it just takes much longer to start then it does when it is cold or cooled down. It has always started, but it is worrisome when I must stop away from home. It has an automatic choke that seems to be operating properly. I have replaced the in line fuel filter (before the fuel pump) put in new AC R43 spark plugs, points and condenser, checked timing and dwell. I only use no alcohol or no ethanol 90 octane rec. fuel. Any suggestions would be appreciated. Thank you in advance. Chuck 52