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#1
01-21-2016, 07:55 PM
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Big Block Chevy Main Bearing Caps
I have a set of BB Chevy 4 bolt Main caps I'm trying to identify. They are for a 2 piece rear main seal with a 334 casting for #1 thru #4 caps and a 336 casting for #5. Can anybody help? Thank you!!
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#2
01-21-2016, 08:49 PM
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Re: Big Block Chevy Main Bearing Caps
Those are the later main caps but work on all two piece rear main seal blocks. I'm not sure when they started that casting number. I'm guessing in the late 70's early 80's but that's just a guess.
964 is the more desirable caps as they are correct for the earlier blocks. Kurt
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 1969 SS396 Post Sedan Delivered to Van-T Topeka KS MCACN Day2 Concourse Gold Award 1965 VW El Lobo Dune Buggy built in the mid 70’s for the Iowa Shriners 1968 Schwinn Orange Krate 1969 Schwinn Pea Picker 1968 Schwinn 5-Speed 1970 Schwinn 3-Speed Deluxe 1972 Schwinn 10-Speed Continental 1973 Schwinn 5-Speed Suburban All Original Paint Bikes
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#4
01-21-2016, 10:33 PM
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Re: Big Block Chevy Main Bearing Caps
Kurt is correct. I believe that cap was made starting in the mid 70's but I'm not sure exactly which year either.
Jason
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