I changed the carb today not much of a difference between the quadrajet & the edelbrock, the car ran a little smoother at idle but power wasn't much better. I checked dist mechanical timing:idle set at 800rpm 9d, @1000=14d ,@1200=20d ,@1500=26d ,@2000=29d ,@2500=31d. I dont Know much about distributors or what the timing should be for this engine. I belive I have a crane cam #283951 288/458