Identifying Chevy engines
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It is common to use just the last three numbers of the c/n when dealing with casting numbers, i.e. block c/n 10243880 would be called an "880" block. Usually the last three numbers aren't repeated but there are cases like the SBC head c/n 462 that- for some unknown reason- was reused 5 times! Fortunately this is rare. | It is common to use just the last three numbers of the c/n when dealing with casting numbers, i.e. block c/n 10243880 would be called an "880" block. Usually the last three numbers aren't repeated but there are cases like the SBC head c/n 462 that- for some unknown reason- was reused 5 times! Fortunately this is rare. | ||
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===SBC engine casting numbers=== | ===SBC engine casting numbers=== | ||
{{Note1}} The Mortec site is no longer available. The Mortec casting number info is listed at the [[Identifying Chevy engines #Mortec|'''bottom of this page''']]. | {{Note1}} The Mortec site is no longer available. The Mortec casting number info is listed at the [[Identifying Chevy engines #Mortec|'''bottom of this page''']]. | ||
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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. | 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. | ||
| − | [[File:Sbc400balancer.jpg|thumb|300px|left|OEM 400 balancer. Note scalloped outer ring]] <br style="clear:both"/> | + | |
| + | Not as easily seen is the gap or void in the SBC 400 main bulkhead webbing. | ||
| + | [[File:Sbc400balancer.jpg|thumb|300px|left|OEM 400 balancer. Note scalloped outer ring]] [[File:Sbc400main web.jpg|thumb|400px||right|Void in 400 main webbing]] | ||
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==BBC== | ==BBC== | ||
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