Thread: Exhaust Manifold Casting Number
View Single Post
  #2  
Old 05-12-2005, 05:27 AM
Mr70's Avatar
Mr70 Mr70 is offline
Yenko Contributing Member
  
Join Date: Jan 2001
Location: Illinois
Posts: 20,903
Thanks: 70
Thanked 3,508 Times in 1,422 Posts
Default 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.
Reply With Quote