There are at least 3. There is one right at each exhaust flange and one or two farther back.
If you suspect that one is plugged, you can just loosen the flanges at the manifold outlet on each side and see if it changes things.
Will it run without them? Yes. Is it legal? No. Will it pass inspection? No.
If you get stopped and checked, you might get into some fines and penalties depending on your state and what the laws are. It just isn't like it was back in the 1980s and 1990s. These days, the EPA is a bit more strict about leaving emission control devices intact and operational.
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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