The tubes run into the back of the heads and down to the crossover. You have to remove the tube from the crossover and plug it then pull the tubes off the back of the heads. They are held on with a bolt on each head that goes through a coupler type thingy. After you get them removed cut the tubes off of the coupler and flip the couplers over and bolt them back down to seal the hole in the head. I removed mine and had no ill effects whatsoever.
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Too much to list. Best ET on the car so far with stock 2.73 gears - 13.73@102mph
Indiana Stangers Association
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