I recently sent off a low mileage head to be rebuilt.. The one off my 76 fj40 I have been taking apart to look at.. I noticed that the spring heights are not even all the way across, and neither were the valve stem heights.. there were a number of running issues before I pulled the motor, and I was wondering how these may have effected it? The PO said he had dropped a seat and had the head rebuilt.. is this just a bad valve job? I would think that these issues would effect duration and cause timeing problems?
Mike
Mike