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#1
05-17-2022, 04:14 PM
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3877660 Water Neck ?
I have a question about the aluminum GM water neck part number 3877660.
I've seen two versions. One has a tab with a hole and the other version does not have the tab. What is correct for a 1970 Chevelle L78 or LS6?
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Joseph Farrow 1970 Chevelle L78 1970 Chevelle LS6 1972 Chevelle LS5 
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#2
05-17-2022, 06:46 PM
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What you show in the photo is correct for a 70 big block.
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Rick Nelson Musclecar Restoration and Design, Inc (retired) www.musclecarrestorationanddesign.com https://www.youtube.com/watch?v=62r-6vgk2_8 specialized in (only real) LS6 Chevelle restorations
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#3
05-17-2022, 08:16 PM
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More then likely the tab broke off of the other one for a throttle return spring or some thing like that.
Dave 67 Nova boy
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1972convss454 (05-17-2022) | ||
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#4
05-17-2022, 09:10 PM
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2 versions of the 660 housing. One has numbers on the neck as shown, other is on the base. Both have the tab. If no tab, then it is a 128 housing.
Last edited by Pacecarjeff; 05-17-2022 at 09:13 PM.
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1972convss454 (05-17-2022) | ||
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#5
05-17-2022, 09:48 PM
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Thanks Guys!
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Joseph Farrow 1970 Chevelle L78 1970 Chevelle LS6 1972 Chevelle LS5
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