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Wouldn't they be UNC? I've never come across BSW on an American motor.
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The Bolts are 3/8 " and grade #8
312T85Bird
What?
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55 GLASS TOP (8/2/2013)
Hello, What size are the studs that hold the exhaust manifold to the heads on a 1955 272 engine thanks They are normally bolts, approx 3/8" BSW X 1" long will do the job,
 AussieBill YYYY Forever Y Block YYYY Down Under, Australia
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Hello, What size are the studs that hold the exhaust manifold to the heads on a 1955 272 engine thanks
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