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			Looking at a 1969 SS 396-375 HP Nova, currently has headers, owner has orginial exhaust manifolds, any idea on correct numbers for I can verify. 
		
		
		
		
		
		
			Thanks Michael 396 
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	Michael 1967 corvette 427-400 HP- 1967 SS396 Chevelle  | 
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			Michael, 
		
		
		
		
		
		
			Manual tranny cars usually have the following casting numbers: LH. # 3909879 RH. # 3916178 They may or may not have threaded bosses for the A.I.R. tubes. Of course, they will have 'cast-in' date codes as well. 
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	Craig S. "I saw Elvis At 1000 Feet" John Force.  | 
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