LT1...LT4 heads question???
Thread Starter
Le Mans Master
Joined: May 1999
Posts: 6,839
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From: Louisville,KY
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LT1...LT4 heads question???
Is the rocker arm stud(same size) threading the same on LT1,LT4 going into the head? I know the LT4 is bigger when it meets the rocker...just wondering if it was the same going into the head.
One of my local dealers has a set of LT4 performance heads(Not production)...he said the only difference was they used LT1 studs on the heads :confused:
Want to see if I can change the studs to real LT4 studs.... :D
One of my local dealers has a set of LT4 performance heads(Not production)...he said the only difference was they used LT1 studs on the heads :confused:
Want to see if I can change the studs to real LT4 studs.... :D
Racer
Joined: Jan 2001
Posts: 425
Likes: 0
From: Frederick MD
Re: LT1...LT4 heads question??? (Zora)
Pretty sure they are all 7/16 into the head. But LT4 uses a non-standard 10mm studs on top where I think the LT1 uses a 3/8 stud, unless you were planning on using the stock LT4 rockers, the 3/8 are more common.
[Modified by tdock, 1:58 PM 1/8/2003]
[Modified by tdock, 1:58 PM 1/8/2003]
Burning Brakes
Joined: Oct 2002
Posts: 1,152
Likes: 1
From: Wichita KS
Re: LT1...LT4 heads question??? (Zora)
The factory LT4 heads installed on the actual 96' vehicle's had 10mm (.394)threads on the top portion of the rocker stud, the LT4 heads you buy now from GM's Performance Parts division have 3/8" (.375) threads on the top portion of the stud, I do believe the lower portion that threads into the head casting is the same 7/16" thread on both model studs...
(I think they only changed the studs not the heads)
I'm only about 90% sure its been awhile...
Check this out, its on the page with the SBC stuff under "rocker studs"
https://www.spoperformanceparts.com/
[Modified by superlund, 3:56 PM 1/8/2003]
(I think they only changed the studs not the heads)
I'm only about 90% sure its been awhile...
Check this out, its on the page with the SBC stuff under "rocker studs"
https://www.spoperformanceparts.com/
[Modified by superlund, 3:56 PM 1/8/2003]
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Le Mans Master
Joined: Apr 2000
Posts: 5,713
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From: Manassas VA
Re: LT1...LT4 heads question??? (Zora)
Want to see if I can change the studs to real LT4 studs.... :D
