LT1 on 1975
Burning Brakes
Joined: Mar 2005
Posts: 1,231
Likes: 34
From: Ontario
Ask for the casting # and the date casting # , a 40 + yr old car could have any heads by now.
If the heads were orig to a 70s LT1 they would have screw in studs , guide plates and O rocker arms .
Bill
If the heads were orig to a 70s LT1 they would have screw in studs , guide plates and O rocker arms .
Bill
Thread Starter
Intermediate
Joined: Apr 2013
Posts: 43
Likes: 0
From: Winnipeg Manitoba
Hello 63split63, I going to try and get a hold of the one is selling them but he is in a different time zone so i'll give him another hour to sleep. Thanks, I am going to look up LT1 #'s so they match what he is selling.
Thread Starter
Intermediate
Joined: Apr 2013
Posts: 43
Likes: 0
From: Winnipeg Manitoba
I just talked to the guy and he said he got them and put them on a 1971 half ton and was written off right after. He would take $400.00 for and they only have about 500 miles on them.
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Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
$400 (plus shipping) for 42 year old used heads that maybe came from a Corvette makes no sense. Putting them on a stock '75 L48 would make little or no difference in performance.
Just trying to help (again)
Just trying to help (again)
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
you could get used ZZ4 heads for that, and they would at least bump your compression and take a few pounds off the front end.
Thread Starter
Intermediate
Joined: Apr 2013
Posts: 43
Likes: 0
From: Winnipeg Manitoba
Thanks, I was trying to save a buck and I've sent an email to summit and they suggested SUM-152123. I have duel exhaust with Magnaflows, But the original heads are not a good flowing so I am going to upgrade. I got the rochester professionally rebuilt and bought a weiand 8004 intake off ebay but before I put that on I want better heads and get headers to put on. The ones that are on their now have been machined but looking for something better.
Le Mans Master
Joined: Oct 2010
Posts: 6,931
Likes: 845
From: melbourne florida
2023 C3 of the Year Finalist - Modified
just to avoid confusion(thanks chevrolet) the 70's era designation is LT-1 the 90's era designation is LT1 god only knows how the will do the new era engine. what a bunch of morons!
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,117
From: Crossville TN
As mentioned above, spending $400 on 40+ year-old heads (and technology) in 'unknown' condition is a true waste of money. If someone had an LT-1 of the same vintage and needed 'correct' P/N and date heads to complete an NCRS project car....maybe. Otherwise, buy a used set of Vortec heads that have been checked out and reconditioned, or sink some money into a good set of aluminum aftermarket heads.
Race Director
Joined: Jul 2001
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Melting Slicks
Joined: Apr 2002
Posts: 2,337
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From: Norfolk VA
Le Mans Master
Joined: Oct 2010
Posts: 6,931
Likes: 845
From: melbourne florida
2023 C3 of the Year Finalist - Modified
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,117
From: Crossville TN
Thanks for your "help", Mike. I was referring to the owner choosing to put exact replacement heads on his/her car. I couldn't care less what NCRS wants to do during judging. Sorry that I invoked that [dreaded] 4-letter acronym, which always seems to upset you.
BTW, are you the official NCRS "bouncer", or are you just paranoid about folks mentioning your 'club'?
BTW, are you the official NCRS "bouncer", or are you just paranoid about folks mentioning your 'club'?
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Thanks for your "help", Mike. I was referring to the owner choosing to put exact replacement heads on his/her car. I couldn't care less what NCRS wants to do during judging. Sorry that I invoked that [dreaded] 4-letter acronym, which always seems to upset you.
BTW, are you the official NCRS "bouncer", or are you just paranoid about folks mentioning your 'club'?
BTW, are you the official NCRS "bouncer", or are you just paranoid about folks mentioning your 'club'?
Carry on.