My 1931 Model A Tudor , Started & Ran Excellent ---- Loaded on car carrier & transported 3,000 Miles ----- Starts Difficult & Runs like Out of Time ??? ( Back fires through Carb. ) ---- ALL Wires & connections seem Intact ???? Rotor & Distributor also seem Intact . ----- ANY IDEAS What I Should be looking for ? --------- I Will try to re-set Timing . --- Thanks for any Input . Paul .