im tryin to get the car buttoned up for the show at my mobile and i have encountered a problem. after i fired it up and ran it for about 30 sec to a minute i shut it down and did a visual check for oil leaks ect.... and everything checked out so i went to refire, and it cranks hard and hits a "tough spot" and the starter wont spin it anymore. it almost seems like if you have the timing too far advanced. i backed off the timing and still hits that same tough spot. if i roll it over by hand a half rotation or so and hit the starter it will fire.....:headscrat any ideas?