Head and main bolt/stud length
May 15th, 2013, 09:06 AM
#1
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Location: Bradenton, FL
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Head and main bolt/stud length
Does anyone have measurements on for head and main bolt lengths? I rounded off the head on a bolt, the shorter one, and am not by the car for a few more days. I want to get it ordered soon.
The long ones are 4 inches long
The 2 short ones are...?
How about main studs? I acquired a stud girdle for a 403 and it included some no name studs I don't want to use, so I was going to order a set from ARP, but don't know the length. What is the length of the main studs on a SBO?
Thanks in advance,
Dan
The long ones are 4 inches long
The 2 short ones are...?
How about main studs? I acquired a stud girdle for a 403 and it included some no name studs I don't want to use, so I was going to order a set from ARP, but don't know the length. What is the length of the main studs on a SBO?
Thanks in advance,
Dan
May 15th, 2013, 10:15 AM
#3
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Are they ARP...? haha Crap...I forgot to mention they are ARP 1/2 inch for a '77 350. That's what I stripped. The one by the A/C evaporator, the short one... I just need the length so I can order the right one from Summit...thanks though
May 18th, 2013, 08:49 PM
#5
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Join Date: Dec 2011
Posts: 7,286
7/16 x 2.98
Head to Block, Short
Lower end positions. Non-std 11/16" Hex [wrench size]. Reduced shank 0.386 dia.
7/16 x 2.98" with
3/8 NC x 3/4 stud end
Head to Block, Short Boltstud
73-74 A-body 350, 455.
PNM says L= 3" x 3/4" stud end.
Head to Block, Short
Lower end positions. Non-std 11/16" Hex [wrench size]. Reduced shank 0.386 dia.
7/16 x 2.98" with
3/8 NC x 3/4 stud end
Head to Block, Short Boltstud
73-74 A-body 350, 455.
PNM says L= 3" x 3/4" stud end.
May 20th, 2013, 08:00 PM
#6
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Location: Bradenton, FL
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Short head bolts are 3.75 underhead length, long ones are 4.25 underhead length. I ordered it. How about main bolts? I acquired some girdle that came with some hardware, but I don't trust the hardware. I was gonna replace it with ARP stuff, but can't find a length that says "for use with girdle"...or something to that effect.
May 28th, 2013, 12:39 PM
#7
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Join Date: Apr 2012
Location: Bradenton, FL
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Called ARP and they said the main studs are
8-7/16x4"
2-1/2x4.4"
Only problem is if the girdle I'm using would need 4.5" and 4.9" respectively. I can only find 7/16x4.350 and 1/2x5.250...anyone have a stud from a girdle kit they could measure?
8-7/16x4"
2-1/2x4.4"
Only problem is if the girdle I'm using would need 4.5" and 4.9" respectively. I can only find 7/16x4.350 and 1/2x5.250...anyone have a stud from a girdle kit they could measure?
May 31st, 2013, 04:20 AM
#8
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Join Date: Jul 2010
Posts: 3
I bought a halo with crappy studs too.
Got my ARP studs to fit it from Jim @ J&S.
Just made a phone call, told him the setup and they were in the post next day.
Give him a ring, he`ll set you up
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