Denny that's funny you say that about the coolant flow....when I fired the car up after I had fixed the broken pushrod and reinstalled the intake I forgot I had drained alot of the coolant out. I let the car run like I said for about 15 minutes....I remembered that I had not refilled the coolant up until 10 minutes after the car was running. I looked at the temp gauge and it read 190 degrees. Would that have been enough time to build that carbon up? I have the coolant all the way up now. Would seafoam help to remove them carbon deposits in the combustion chamber? I'm glad you pointed that out because that seems to fit the situation.
If seafoam is an option would you just pour it down the carb or let it get sucked up by the brake booster line? I have done this on my 94 blazer. I guess I'm just really worried about the ping when I start up. I don't want to ruin anything. I know when you put the seafoam in the engine needs to be running. What do ya think....