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 Blocks / Cranks/ Rods and Pistons
 Engine bolts
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js292
Sitting Bull

USA
128 Posts

Posted - 19 Jan 2017 :  11:49:46 AM  Show Profile  Reply with Quote
Can someone tell me what size the motor mount to block bolts are, and the valley pan bolts?

Thanks,
John



71 Formula 455

cortcomp
Coyote

USA
5335 Posts

Posted - 19 Jan 2017 :  12:25:21 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
I don't know the sizes off hand, but i have read if you get too long of valley pan bolts or suck them down in too far, you can hit or bind the cam bearings? So, i always use oem bolts there if i can find them so i'm not overthinking a small detail.
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Steve C.
Crazy Horse

1674 Posts

Posted - 19 Jan 2017 :  2:00:31 PM  Show Profile  Reply with Quote
http://www.spottsperformance.com/enginefasteners
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js292
Sitting Bull

USA
128 Posts

Posted - 19 Jan 2017 :  3:25:42 PM  Show Profile  Reply with Quote
Cort I started with a bare block,so I don't have any of the OEM stuff.



71 Formula 455
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cortcomp
Coyote

USA
5335 Posts

Posted - 19 Jan 2017 :  3:39:52 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
That $40 stainless kit wouldn't be a bad way to go then. Look good, won't rust, everything already the right length and labeled.
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Blued and Painted
Chief PONTIAC

USA
3405 Posts

Posted - 19 Jan 2017 :  6:50:11 PM  Show Profile  Reply with Quote
I dont see the valley pan bolts.


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.
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js292
Sitting Bull

USA
128 Posts

Posted - 20 Jan 2017 :  10:19:11 AM  Show Profile  Reply with Quote
I have the black oxide ARP engine kit, but it didn't come with the valley pan bolts either. I wanted the stainless kit originally but had seen some people complaining about them coming loose and developing leak issues.Probably could have been a torquing issue on their part but it was something I didn't want to potentially deal with.



71 Formula 455
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js292
Sitting Bull

USA
128 Posts

Posted - 20 Jan 2017 :  2:53:57 PM  Show Profile  Reply with Quote
i found this site that looks like it has what I'm looking for, here's the link if anyone else needs the corrrect nuts and bolts for your car.

https://www.amkproducts.com/Pontiac_Fastener_Kits.asp



71 Formula 455
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Miles
Sitting Bull

Canada
140 Posts

Posted - 24 Jan 2017 :  09:44:30 AM  Show Profile  Reply with Quote
I would avoid using stainless fasteners in an engine block. Higher chance of galling, dissimilar metal corrosion, different heat expansion rate and lower strength than original hardware. Try to get an OE replacement or use ARP.
Just my opinion I'm not a metallurgist.
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