GuFFEY 86 F-150

On my 86f150 with a straight 6 300cid If I drive it for about thirty min. Or until it is good and warm and then say stop at the store and cut it off four a min. Or two when I go to start it again it turns very slow like I have a dead batt. And will not start If I wait for about ten min. It will start very easy. This is what I have replaced: batt. Bigger and better, starter, starter soloind, pos. And neg. Batt. Terminal. Thank you for any help.