Thread: Chevy 350 Question?
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04-16-2005 02:37 PM #1
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Chevy 350 Question?
I was wondering if anyone knows how to tell a 350 CI 4 bolt main from a 2 bolt main without taking the oil pan off? The engine code number 3970010 says that it could be a 2 or a 4 bolt
Thanks
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04-17-2005 05:29 PM #2
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Welcome, Not being a chevy expert I have found a great deal of ID info on http://www.nastyz28.com/sbcmenu.html Give it a try and best of luck... marco
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04-17-2005 06:11 PM #3
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If ya had an X ray machine, the pan might be thin enough to look through with it but, if you used it, you'd also be steril
Your gonna have to pull the pan if the block ID says it can be both.You don't know what you've got til it's gone
Matt's 1951 Chevy Fleetline- Driver
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1930's styled hand built ratrod project
1974 Volkswagen Super Beetle Wolfsburg Edition- sold
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04-17-2005 06:47 PM #4
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that or if its a junkyard motor and you're planning on replacing the pan... cut it open with a hacksaw
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04-20-2005 02:19 PM #5
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If it's the engine that came in your 78 El Camino the chances are it is a four bolt. That casting has been used for some time in both two and four bolt versions. Most passenger vehicles got the two bolt but the trucks and yes the El Camino is a truck and severe duty engines were four bolts. Hope this helps.
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04-20-2005 02:29 PM #6
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The ElCamino Still has the orignal 307 in it. The 350 is from a 78 GMC pickup truck
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04-20-2005 02:32 PM #7
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Oops that might have been a 75, I was just corrected by my wife
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Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
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