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I am rebuilding my Belair convertible 283 250hp and the exhaust manifolds are both cracked. Which ones are the correct ones I should buy? I need both the left and the ride side.
 

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Stainless Trim Restoration
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The RH is special, it is not drilled for the choke tube used on most passenger cars. The FI unit has an electric choke. The LH is the same as all passenger cars.

Mikey
 

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From my stock '57 4bbl 283:
Left exhaust manifold casting number: 3733975
Right exhaust manifold casting number: 3733976 (has the choke tube)
 
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