Identifying Chevy engines
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*[http://chevytech.info/3c10o12.html Head info by c/n, some with photos] | *[http://chevytech.info/3c10o12.html Head info by c/n, some with photos] | ||
| − | ==Big block== | + | ==Dampers/balancers== |
| + | ===SBC=== | ||
| + | On a 350 SBC engine and internally balanced stroker engines, there will be no discernible difference in the dampers- they are neutral balanced. | ||
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| + | On the 400 SBC and externally balanced stroker engines, an OEM damper will have a scalloped portion to the outer ring which is easily seen. Aftermarket dampers usually use a bolted on counterweight, which is also usually easily seen. | ||
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| + | [[File:Sbc400balancer.jpg|thumb|300px|left|OEM 400 balancer. Note scalloped outer ring]] <br style="clear:both"/> | ||
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| + | ===Big block=== | ||
| + | The 396/402 and 427 ci BBC engines were internally balanced. The 454 can be ID'd by its balancer having the inner hub cast with a counterweight. | ||
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| + | [[File:Bbc454 oem balancer.jpg|300px|left|thumb|BBC 454 OEM balancer. Note inner hub counterbalance]] <br style="clear:both"/> | ||
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| + | ===BBC external cues for 2- or 4-bolt bottom end=== | ||
While not 100%, a Mark IV BBC engine can sometimes be ID'd for being a 2- or 4-bolt bottom end by looking above the filter mount: | While not 100%, a Mark IV BBC engine can sometimes be ID'd for being a 2- or 4-bolt bottom end by looking above the filter mount: | ||
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