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#1
05-12-2005, 04:36 AM
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Exhaust Manifold Casting Number
What is the correct casting number for the left exhaust manifold for 70 Chevelle LS5, M22 with Heat only
My "Catalog of Chevy V-8 Engine Casting Numbers 1955-93" doesn't have this listing.......or I'm not quick enough to find it! Thanks!
__________________
Howard Growing old is a certainty, growing up isn't 
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#2
05-12-2005, 05:27 AM
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Re: Exhaust Manifold Casting Number
LH is #3909879 and ALL 1970 BB Chevelle-Elco-Monte Carlo-Camaro-Nova shared this,be it A.I.R. equipped or not.Of course A.I.R. had tapped access holes.
The RH is #3916178 & was used from 1968-1970 on ALL BB models. The 1970 LH Manifold was a one year only design,and unique in that it has a flat locating tab on the #1 cyl. ex.port only. 1968-69 did not have this tab,1971-72 did have this tab,but went by a different part,#3989343.
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#3
05-12-2005, 06:19 AM
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Re: Exhaust Manifold Casting Number
Thanks Rick, I was hoping you were "by the channel."
__________________
Howard Growing old is a certainty, growing up isn't
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