The exhaust manifold allows very tight access to the spark plugs on the drivers side of my 273. There is always a risk of damage in installing and removing the wires, especially in insuring they are seated properly . In looking for a good tool I found the following on the NAPA website - SER2568. It is actually an American made KD tool and cost under $5. It looks like old stock so if you need one you might check it out. It works great.
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