Question about heads for a 1978
Thread Starter
Racer
Joined: Sep 2013
Posts: 343
Likes: 10
From: Jackson New Jersey
Question about heads for a 1978
Recently bought a set of extra heads for my 1978 that were advertised as such:
set of cylinder heads from a 25th anniversary Chevrolet Corvette. Casting numbers are 462624. Date codes are G208 and G228. These were cast on July 20 and 22 of 1978. These are the higher performance Corvette heads, with the factory screw in rocker arm studs and guide plates.
Didn't pay hardly anything for them so thought what the heck....my question is.....is this information correct...I thought the rocker arm studs for 1978 were press fit and did not have guide plates...???????
set of cylinder heads from a 25th anniversary Chevrolet Corvette. Casting numbers are 462624. Date codes are G208 and G228. These were cast on July 20 and 22 of 1978. These are the higher performance Corvette heads, with the factory screw in rocker arm studs and guide plates.
Didn't pay hardly anything for them so thought what the heck....my question is.....is this information correct...I thought the rocker arm studs for 1978 were press fit and did not have guide plates...???????
Race Director
Joined: Dec 2004
Posts: 10,332
Likes: 63
From: PARADISE
St. Jude Donor '09-'11-'12-'13-'14
The 624 heads are among the worst of the worst. Don't bother spending any money on them. They are highly prone to cracking in critical places, and do not take kindly to port work as a result; their combustion chambers are a cavernous 76cc, and leave you with a compression ratio way short of anything resembling performance; and their flow..... well, they're part of the formula for building 180 HP 350s and 185 HP 400s because they're so restrictive.
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
Melting Slicks
Joined: Nov 2005
Posts: 3,323
Likes: 142
From: Green Valley Arizona
You are correct in that the rocker studs are pressed-in and no guide plates on stock 624 heads.
These are really good heads though....for throwing into neighbor's pool!.....make a really good splash!!!!
Hope you did not pay more than a $1 for each of them.
These are really good heads though....for throwing into neighbor's pool!.....make a really good splash!!!!
Hope you did not pay more than a $1 for each of them.
Le Mans Master
Joined: Oct 2010
Posts: 6,938
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
If someone was restoring a Car and If they needed a set of heads and if they found out you had them then maybe they would be worth something to somebody. But the chances are slim that would be the case.if they are the L-82 heads they have 2.02 valves in them. I wouldn't use them to throw in the neighbors pool,they probably would be worth something to a scrap dealer.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Well if u have screw in studs and guide plates then i would remove those parts along with the larger 2.02"/1.6" vlvs. More than likely the vlvs are still good enough to be re-used (but maybe not). This allows u to take a small vlv small chamber head and make it higher performance for next to nothing.
I think many overlook the value of used parts because it adds a lot of work to their project. That and their suspicious of used parts. Reality is your C3 will see less than 5k mi/yr. U can build a 400hp sbc for nearly pocket change. But not 500hp - u spend 5 times the money.
Ok thats my new year eblaboration.
I think many overlook the value of used parts because it adds a lot of work to their project. That and their suspicious of used parts. Reality is your C3 will see less than 5k mi/yr. U can build a 400hp sbc for nearly pocket change. But not 500hp - u spend 5 times the money.
Ok thats my new year eblaboration.
Thread Starter
Racer
Joined: Sep 2013
Posts: 343
Likes: 10
From: Jackson New Jersey
Seems like people are missing my question....
Did heads like these:
set of cylinder heads from a 25th anniversary Chevrolet Corvette. Casting numbers are 462624. Date codes are G208 and G228. These were cast on July 20 and 22 of 1978. These are the higher performance Corvette heads, with the factory screw in rocker arm studs and guide plates.
Actually come on the 1978 model.....????? with the factory screw in rocker arm studs and guide plates.
I am just looking to keep my car original...I'm not looking to change it to get higher perforamance with diffirent heads....
Thanks
Did heads like these:
set of cylinder heads from a 25th anniversary Chevrolet Corvette. Casting numbers are 462624. Date codes are G208 and G228. These were cast on July 20 and 22 of 1978. These are the higher performance Corvette heads, with the factory screw in rocker arm studs and guide plates.
Actually come on the 1978 model.....????? with the factory screw in rocker arm studs and guide plates.
I am just looking to keep my car original...I'm not looking to change it to get higher perforamance with diffirent heads....
Thanks
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Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Ok a originality type then. Sorry but no one caught that. Well that cast number head was not only used on corvettes but camaros and a whole lota trucks from 1971 through 1985 besides being the overcounter stock replacement head for maybe even decades. But the casting dates put them july 20 and 22 of 1978 so would be a match for your vette.
Now if your into that numbers match scene then u might consider the holy grail of early corvette knowledge by Alan L. Colvin - corvette by the numbers. It states 1978 corvette heads as only using the 462624 head casting but in either large 2.02"/1.6" vlvs or the smaller 1.94"/1.5" vlvs. I have to say your good to go w/those heads on a '78 my friend.
Now if your into that numbers match scene then u might consider the holy grail of early corvette knowledge by Alan L. Colvin - corvette by the numbers. It states 1978 corvette heads as only using the 462624 head casting but in either large 2.02"/1.6" vlvs or the smaller 1.94"/1.5" vlvs. I have to say your good to go w/those heads on a '78 my friend.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Oh, BTW A. Colvin didnt say specifically the 1978 L82 heads had screw-in studs and guide plates. But he mentions for the #333882 castings 1974 - 1977 all the L82 heads had screw-in studs and guide plates.