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427 CHEVY 4 Bolt Main

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Old Jan 11, 2024 | 08:33 AM
  #1  
11971four4two's Avatar
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From: minnesota USA
427 CHEVY 4 Bolt Main

Block Sold
I do have heads crankshaft and other BBC parts
Good base to build a 496 Stroker Motor
CONSIDER TO BE A CORE TO REBUILD AS IS NO WARRANTY

$1000 CASH Located near minneapolis mn
I have a shop crane and will help load it up.
NO SHIPPING
NO DELIVERY

Thank You

Block Casting number is 473478
Produced from 1968 to 1978

Last edited by 11971four4two; Nov 8, 2024 at 07:55 AM.
Old Jan 11, 2024 | 09:04 PM
  #2  
Lonnies Performance's Avatar
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From: Pittsburgh, PA
Thats a tall deck truck engine, which should also have a steel crank,

Most have enough cylinder wall thickness to accept a .100 overbore & some are good for .125 over.
A good basis for a big cube budget engine.
Old Jan 12, 2024 | 12:43 AM
  #3  
11971four4two's Avatar
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I have read that this block was used in trucks , has FORGED Crankshaft and Beefy connecting rods..
Interesting that near the casting number on the back of the engine block it looks to also have casting mark "MARINE"

Last edited by 11971four4two; Jan 12, 2024 at 12:46 AM.
Old Jan 13, 2024 | 07:14 AM
  #4  
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Correct, these blocks were used on both commercial trucks & marine applications.

They have a heavy piston with an extra oil ring & .4" taller deck height.
Some blocks also have more lower end clearance that will accommodate a 4.25" stroker crank without any additional clearance grinding.

I built these years ago, bored .100" over with 4.25" cranks for 505 CI.
This was the way to go before big bore factory/aftermarket blocks were readily available.
Old Jan 14, 2024 | 03:45 PM
  #5  
11971four4two's Avatar
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pictures







Old Jan 15, 2024 | 06:13 AM
  #6  
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From: MA.
Given the fact it has those manifolds it’s safe to say a truck not marine application. Better chance of less internal corrosion.GLWS
Old Jan 22, 2024 | 01:33 PM
  #7  
11971four4two's Avatar
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From: minnesota USA
pictures

the motor is pretty clean inside





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