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#12
02-09-2022, 07:47 PM
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According to a 1987 General Motors Performance Parts catalog I have: ID # 3947886 is part # 3959105 Piston assembly STD, 427 CID, Chevrolet 68-69 W/H.D. & Aluminum Block (RPO L-88 & ZL-1) 12.5:1 Open Chamber, Forged Aluminum, Floating Pin Design, Use retainer P/N 3942423 (I.D.3947886 or 3959108) I hope this helps.
Bill 
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| The Following User Says Thank You to Big Block Bill For This Useful Post: | ||
the427king (02-10-2022) | ||
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#13
02-09-2022, 08:11 PM
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Thank you BB Bill....
RA
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#14
02-09-2022, 10:16 PM
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Your welcome, glad to help.
Bill
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#15
02-10-2022, 02:41 AM
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Open chamber.
__________________
Ebay Auctions http://www.ebay.com/sch/427-king/m.h...=16&_rdc=1 No Fisher priced toys here
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#17
02-14-2022, 04:16 PM
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Thanks, Im looking for 1st design pistons that work with the 3919842 aluminum heads. It has around 106.8cc closed chamber head. I thought the combination could work one way, but not the other. I donÂ’t think open chamber pistons will work with a close chamber head.
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#18
02-14-2022, 05:02 PM
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No they will not
Bill
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