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71 340's had a aluminum spacer plater under the carb about 1/4". Why is your air cleaner hitting the pad? Is the engine 100% stock? Might be a fuel pump or filter, where is the initial timing set at?
My bad, may car was restored to look stock. In reality it has a 72 block and I believe a 73 spread bore intake with a 74 TQ. No spacer in there now. I think the timing was set at 13 degrees BTDC. I am going to recheck the timing tomorrow to see if that is where its at.
I just filled up with the same gas I have been running in it all along, so the next tank I will switch it up and see if there is a difference.
2016 Diesel Ram 3500 Mason Dump
1971 Challenger
2013 Jeep Wrangler
1979 Dodge Ram Power Wagon 400 Mini Pumper
My other car is a Fire Truck.
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