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10-30-2010, 06:05 PM
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#1 |
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Registered User
Join Date: Sep 2010
Location: Brownsville, Texas
Posts: 240
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Bolt size
I plan on switching out PO's headers to the original ram horns in a couple of months. I am collecting the parts that i need. My question is what size bolts am i going to need to mount them. I know they are 3/8 x 16 but what lengths do i need . I know the center ones are longer than the four outside bolts. I plan on using grade 8 bolts am i correct on that?
__________________
It's not rust...It's character! |
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10-30-2010, 06:06 PM
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#2 |
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Account Suspended
Join Date: Sep 2010
Location: hingham ma
Posts: 1,721
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Re: Bolt size
I'd use s/s
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10-30-2010, 06:30 PM
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#3 |
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Hollister Road Co.
Join Date: Apr 2005
Location: Houston
Posts: 6,131
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Re: Bolt size
I don't remember the lengths but you want 1 and a half time the bolt diameter to screw into the head. So about 1/2 to 9/16". Measure the manifold add 1/8 for an SAE flat washer not an USS and add the 9/16"
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10-30-2010, 08:27 PM
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#4 |
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Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: Bolt size
You can get the original bolts at the salvage yard if you want the originals. Don't forget the heat shields & locking tabs.
s/t
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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