4 bolt main GM 3970010
Race Director
Joined: Feb 2007
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From: northern california
C2 of Year Finalist (track prepared) 2019
The "010" blocks can be quite good. Many were made with 4 bolt mains and many were made with high levels of tin and nickel which makes them very durable.
My memory of the "882" heads is that they are lightweight, low compression, "smog motor" heads that are prone to cracking if overheated. AFAIK they all have 1.94/1.50 valves.
Jim
My memory of the "882" heads is that they are lightweight, low compression, "smog motor" heads that are prone to cracking if overheated. AFAIK they all have 1.94/1.50 valves.
Jim
Race Director
Joined: Nov 2000
Posts: 10,334
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From: Beverly Hills (Pine Ridge) Florida
The "010" blocks can be quite good. Many were made with 4 bolt mains and many were made with high levels of tin and nickel which makes them very durable.
My memory of the "882" heads is that they are lightweight, low compression, "smog motor" heads that are prone to cracking if overheated. AFAIK they all have 1.94/1.50 valves.
Jim
My memory of the "882" heads is that they are lightweight, low compression, "smog motor" heads that are prone to cracking if overheated. AFAIK they all have 1.94/1.50 valves.
Jim
But I agree they are not "performance" heads due to the low compression / large compression chamber, but also due to the poor exhaust port design.
Note also that these heads used the Chevy induction hardened valve seats. Originally (early heads) they were prone to cracking around the seats. Chevy refined their technique, and by 74 the process was pretty good.
Plasticman
Last edited by Plasticman; May 4, 2010 at 12:56 PM.
Drifting
Joined: Dec 2002
Posts: 1,946
Likes: 28
From: Long Beach CA
The 882 heads are probably OK, but they're not performance heads. They have 76cc combustion chambers, so if the engine has flat-top pistons, you're looking at probably 8.5:1 compression. Nice if you're building a beater to run on regular gas...but even then you could put on better heads that raise the CR a bit and still run regular.
Le Mans Master
Joined: Sep 2001
Posts: 5,392
Likes: 28
From: Arlington Tx
St. Jude Donor '08
My engine has a 010 350 and HAD 882 heads. The 882s are from the mid 70s when performance was a joke. They worked well enough, but nothing special.
I installed a pair of 65ish 461s, on that engine and it made a really sweet difference.
I installed a pair of 65ish 461s, on that engine and it made a really sweet difference.
Le Mans Master
Joined: Feb 2001
Posts: 8,017
Likes: 2
From: The problem is all inside your head she said to me.
Last edited by INMYBLOOD; May 4, 2010 at 12:44 PM.
