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Old December 28th, 2009, 11:07 PM   #1
rustycj5
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Default 1978 400 sbc 509 2 Bolt KEEPING PLEASE DELETE

I have a stock 1978 Chevy 400 SB out of a half ton truck. This motor has under 40,000 miles on it. Has 50-60 psi of oil pressure cold and 15-20 psi warmed up at an idle. Motor will come complete (all accesories to flywheel, pan to carb) Engine identification number is 3951509. Let me know if there is any more info that you want. Asking $500 OBO

KEEPING PLEASE DELETE

Last edited by rustycj5; January 11th, 2010 at 11:23 PM.
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Old December 28th, 2009, 11:25 PM   #2
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is this a 2 bolt or 4 bolt main?
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Old December 28th, 2009, 11:35 PM   #3
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http://www.thedirtforum.com/castings.htm

3951509
3030817 74 - 76 400 HP 150-265 2 Bolt Mains ++High Nickel Block
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Old December 29th, 2009, 01:17 AM   #4
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CASTING#.....SIZE...YEAR...MAIN CAP BOLTS
3951509........400....70-71......4
3951509........400....74-80......2


http://www.mortec.com/castnum.htm
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Old December 29th, 2009, 01:27 AM   #5
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http://en.wikipedia.org/wiki/Chevrol...l-block_engine

The only block of this family, 400 cu in (6.6 L) small-block, was introduced in 1970 and produced for 10 years. It was loosely based on the medium journal 350 and had a 4.125-inch (104.8 mm) bore and a 3.75-inch (95.3 mm) stroke. The 400 differed from other small blocks in that the cylinders were siamesed, used a 2.65” large journal, and often times had one more freeze plug on both the left and right sides of the block. Initial output was 265 hp (198 kW) and was only available equipped with a 2-barrel carburetor. In 1974 a 4-barrel version of the 400 was introduced, while the 2-barrel version stopped production in 1975. 1976 was the last year that the 400 was used in a Chevrolet Passenger car, available in both the A-Body and B-Body line. While popular with circle-track racers, the engine was prone to cooling troubles if cylinder heads without steam holes were used. They mostly put out 250 hp stock. Due to the way the block was designed, the 2 bolt main engines were stronger than the 4 bolt versions if properly prepped. The 509 2 bolt main block is the most desirable 400 block

Last edited by rustycj5; December 29th, 2009 at 08:31 PM.
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Old December 29th, 2009, 01:50 AM   #6
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ya you take the 2bolt and have it machined to use a spade cap
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Old December 29th, 2009, 08:08 PM   #7
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bump
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Old December 31st, 2009, 08:11 AM   #8
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open to offers
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Old January 3rd, 2010, 01:37 AM   #9
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ttt
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Old January 3rd, 2010, 07:44 PM   #10
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pm'd
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Old January 3rd, 2010, 10:59 PM   #11
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returned PM
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Old January 8th, 2010, 05:59 AM   #12
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Old January 11th, 2010, 11:23 PM   #13
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