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#1
02-11-2008, 02:51 AM
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Re: 70 Z28 Engine Block Casting Numbers
Here is a photo of mine
 
__________________
Carl 
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#2
02-11-2008, 06:49 PM
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Re: 70 Z28 Engine Block Casting Numbers
Don't smack it with a hammer just yet - try a magnet!
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Marlin 70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride) 69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride) 67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
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#3
02-11-2008, 07:33 PM
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Re: 70 Z28 Engine Block Casting Numbers
You don't have to smack it,just tap it firmly.
I actually cracked off an epoxied one that a magnet did stick to. Turns out the forger added fine metal shavings to the epoxy.
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#4
02-11-2008, 10:18 PM
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Re: 70 Z28 Engine Block Casting Numbers
 Was probably easier to find the correct block vs. going through all the 'casting' work!
__________________
Marlin 70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride) 69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride) 67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
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#5
02-11-2008, 10:26 PM
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Re: 70 Z28 Engine Block Casting Numbers
As I recall the 3970010 casting # was used for a large variety of applications and years. Someone will need to check this but I think that casting # applied to 2 and 4 bolt mains and ranged from the late 60's thru the late 70's.
__________________
Carl
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