Building an inline 6 Chevy 250 engine
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Obviously casting numbers and VIN stampings can be a big help. Chevy inline 6 casting numbers can usually be found just above the starter on the passenger side of the block. | Obviously casting numbers and VIN stampings can be a big help. Chevy inline 6 casting numbers can usually be found just above the starter on the passenger side of the block. | ||
| − | + | The deck height of the Chevy 230 and 250 inline 6 engines is shorter than the 292 inline 6 engine. That means the pushrod cover is shorter on those engines than on the 292 Chevy 6, as seen below. | |
| + | {| | ||
| + | |[[File:Vin stamp.jpg|thumb|center|300px|250 Chevy inline 6. Location of VIN/application code stamping for 1962 and newer engines is circled]] | ||
| + | |[[File:CHEVY 292 INLINE SIX-1 (1).jpg|thumb|center|300px|292 Chevy inline 6 with taller side cover]] | ||
| + | |} | ||
| − | [[ | + | See '''[[Building a Chevy 250 engine#Resources|below]]''' under '''Resources''' for a few sites that have casting number info. |
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==Cylinder heads== | ==Cylinder heads== | ||
| − | + | Because of the lack of aftermarket support for inline Chevy 6 cylinder heads, the hotrodder is left with the removeable intake head from the early/mid '70s as the best choice for performance use unless the cost of a custom head can be justified. | |
| − | + | There are heads for the Chevy inline 6 that have been made from 2 SBC aftermarket aluminum heads that have been divided and welded back together. | |
===Intake ports=== | ===Intake ports=== | ||
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==Intake manifolds== | ==Intake manifolds== | ||
| − | The integrated intake head isn't well suited for performance duty. About all that can be done for | + | Beginning in the mid-'70s, the inline 6 Chevy got an integrated intake cylinder head. This was a step in the wrong direction for a performance engine- the intake being cast as part of the head means it would take too much work to remove it to be able to use any kind of 4-barrel carb. |
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| + | The integrated intake head isn't well suited for performance duty. About all that can be done for a head with this intake, is the 1 barrel can be swapped for a 2 barrel by using an adaptor. Not the hot ticket. The same lump port mods along with porting, larger valves, etc. can be done to ANY head, but without the ability to use a high performance intake, these mods would be largely wasted. | ||
Using the earlier head with the detachable intake from a 230 or 250 inline Chevy 6 offers a much better platform. | Using the earlier head with the detachable intake from a 230 or 250 inline Chevy 6 offers a much better platform. | ||
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:[http://www.novaresource.org/codes.htm Engine codes], from NovaResource.com | :[http://www.novaresource.org/codes.htm Engine codes], from NovaResource.com | ||
:[http://www.adchevy.com/tools/castinglookup/ Casting number look up tool] and link to c/n lists from adchevy.com. | :[http://www.adchevy.com/tools/castinglookup/ Casting number look up tool] and link to c/n lists from adchevy.com. | ||
| + | :[http://www.inliners.org/tech/heads/headindex.htm 1962-up head casting numbers] from Inliners.org | ||
'''[[Building a Chevy 250 engine#Engine ID|Return to top]].''' | '''[[Building a Chevy 250 engine#Engine ID|Return to top]].''' | ||
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