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MAURICE BLENDHEIM · 03-25-2015, 07:22 PM

Hey Rod in AZ…The first production run for these heads was in 1971 and the second production run was in 1973. The second run were improved over the first batch. The stock combustion chamber volume was 66cc. Hope this helps…MB.

03-25-2015, 07:22 PM	#2
MAURICE BLENDHEIM Senior Member Join Date: Jun 2011 Location: Langley (no igloos), British Columbia, Canada Posts: 551 Likes: 269 Liked 228 Times in 78 Posts	Re: SB Chevy '292' head ? Hey Rod in AZ…The first production run for these heads was in 1971 and the second production run was in 1973. The second run were improved over the first batch. The stock combustion chamber volume was 66cc. Hope this helps…MB.