The motor will idle fine and cruise at a low rpm. It will run at full throttle for a few minutes then,makes a loud knocking sound, like really loose lifters in your car, then dies. After that it takes a while but will restart. Also I'm having trouble finding out what the rest of the ID means 6703D-E01406 besides that it's a 1967 motor. Any help would be greatly appreciated, a manual is on the way.
