Casting numbers
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
That's not a casting number, it's a stamping number.
If all you have is the block, it's useless; it refers to the type of vehicle it was installed in, among other things. But there's nothing vehicle-specific about a block.
V = Flint engine plant
1st letter after the numbers is T = truck
Beyoind that I have no clue. Never have researched it because it's so useless.
The number that really matters is the casting number. It can be found here, behind the driver's side head, on top of the bell housing flange.
If all you have is the block, it's useless; it refers to the type of vehicle it was installed in, among other things. But there's nothing vehicle-specific about a block.
V = Flint engine plant
1st letter after the numbers is T = truck
Beyoind that I have no clue. Never have researched it because it's so useless.
The number that really matters is the casting number. It can be found here, behind the driver's side head, on top of the bell housing flange.
Next question, I got the grease cleaned off the heads and noticed they have different casting marks. So I pulled the valve covers off and one is a 493 (#3873493) cast on September 27 1971. The right side head is a 882 (#333882) cast on April 21 of 1976. What are (if any) the differences in these heads? I know they are both heavy casting smog heads but what about port volume, combustion chamber volume, etc. The engine was running with them on, but are the similar enough th run as a set?
Martin
Martin
Kinda hard table to follow but just follow the commas
FR, StampRPO, CID, appl, HPBody/Comments
1970, TBC, 350, convfwd cabs a/t, 255hp, C-10 to 3500
1970, TBC, 350, m/t, 3 spd, 255hp, K-10 & 20
1979, TBC, 350, conv. cab m/t L LS9 165hp, C-10 to 2500
I got that information from that number off of a different site. So I am not convinced that it is worthless. What does the casting number off the back off the block tell me different? It is 3970010 and the date is January 17 1979. All I really wanted to know was displacement, the rest is pointless to me, but you have my interst piqued now.
Martin
FR, StampRPO, CID, appl, HPBody/Comments
1970, TBC, 350, convfwd cabs a/t, 255hp, C-10 to 3500
1970, TBC, 350, m/t, 3 spd, 255hp, K-10 & 20
1979, TBC, 350, conv. cab m/t L LS9 165hp, C-10 to 2500
I got that information from that number off of a different site. So I am not convinced that it is worthless. What does the casting number off the back off the block tell me different? It is 3970010 and the date is January 17 1979. All I really wanted to know was displacement, the rest is pointless to me, but you have my interst piqued now.
Martin
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From: Valley of the Sun
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010 blocks are very plentiful and is very common casting. Since its a 79 its has to be a 350.
010 blocks are very plentiful and is very common casting. Since its a 79 its has to be a 350.
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From: Loveland, OH, US
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Engine: 6
Transmission: 5
They're fairly similar; except the 882 is a "lightweight" casting, and the 493 is an ealrier model one. Both pitiful smogger garbage from the depths of the smogger era; basically 2-barrel CAFE/smog heads. Dispose of them immediately if not sooner.
010 is a very common 350 block casting through the 70s. But, a block is a block is a block, for the most part; so it's as good, or bad, as any other stock block from the 70s. The things to watch for on that, are yerbasic quality control issues that 70s motors were plagued with. Other than those, it's fine as a foundation for a build-up.
010 is a very common 350 block casting through the 70s. But, a block is a block is a block, for the most part; so it's as good, or bad, as any other stock block from the 70s. The things to watch for on that, are yerbasic quality control issues that 70s motors were plagued with. Other than those, it's fine as a foundation for a build-up.
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From: Kingston, Tn
Car: 1987 GTA
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Actually, the 882's are a good head. 1.94int 1.5exh valves and a 68cc chamber on them.
The 882's were put on almost all of the quadrajet engines
They're a smaller version of the doublehump head (186's)
Ok, my bad...the 882's are 76cc, but considered to be the best of the lightweight casting heads. There are guys who are getting over 300hp with these heads ported and polished.
The 882's were put on almost all of the quadrajet engines
They're a smaller version of the doublehump head (186's)
Ok, my bad...the 882's are 76cc, but considered to be the best of the lightweight casting heads. There are guys who are getting over 300hp with these heads ported and polished.
Last edited by Klortho; Aug 1, 2004 at 10:44 PM.
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
882 are smogger crap heads, they aren't even good for a smogger head. Place them in the garbage where they belong. There is absolulty zero performance aspect about them. Get rid of them. They are the low compression smog POS's. The only thing good to them is their value (what little of it there is) is at the metal recycler. I have one in my room as porting practice. It is now a door stop. The other one is a boat anchor. I could say more about these disgraceful pieces, but I think i got my point across. If you want more about the, do a search about "882 heads" and you will see that I am not the only one with these feelings. Melt them down and make a statue or something.
And for the record, they dont have 68cc chambers, they are cast as 76cc.
And for the record, they dont have 68cc chambers, they are cast as 76cc.
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Joined: Jan 2002
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
There are guys who are getting over 300hp with these heads ported and polished.
I am not trying to make horsepower, just put together an engine for my '76 Chevy K10. It is an old, rusty, beat up farm truck. I pulled this engine out of my '75 K20 and was going to throw a rering and gasket set in it, well by the look of the lifters it needs a cam too. But no I wasn't worried about the strength of the block, or the quality of the heads, just if it was a 350 and if the heads are fairly similar.
By the way the first 350 I put together in high school had 882's and it ran very well for what it was. There are worse heads out there. Now if I was trying to go fast, no I wouldn't use them.
Martin
By the way the first 350 I put together in high school had 882's and it ran very well for what it was. There are worse heads out there. Now if I was trying to go fast, no I wouldn't use them.
Martin
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From: Loveland, OH, US
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"find out"? Those heads have been in the world for over 30 years now. What's to "find out"?
The 493 is an old garbage heavy early-smog casting. 400 2-barrel 76cc crap IIRC, maybe on the first few 160 HP 350s too. Definitely to be avoided, if you're looking for something to run good.
The 882 was one of the first of the "lighweight" castings. One look, and you can tell the difference. You can see the "weight" difference from literally hundreds of yards away (at least I can.....)
For some truck to run around in fieds and haul stuff, it hardly matters how close they are to each other; they'll be fine for that, close enough tp a match. Not the kind of motor I'd ever build, even for hauling; but it will get the job done, at some minimal level. I sure wouldn't spend any money on them though.
The 493 is an old garbage heavy early-smog casting. 400 2-barrel 76cc crap IIRC, maybe on the first few 160 HP 350s too. Definitely to be avoided, if you're looking for something to run good.
The 882 was one of the first of the "lighweight" castings. One look, and you can tell the difference. You can see the "weight" difference from literally hundreds of yards away (at least I can.....)
For some truck to run around in fieds and haul stuff, it hardly matters how close they are to each other; they'll be fine for that, close enough tp a match. Not the kind of motor I'd ever build, even for hauling; but it will get the job done, at some minimal level. I sure wouldn't spend any money on them though.
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
882 heads are/were made as both the pre '75 heavy casting like a 920 head and a light weight casting like a 416 head up to 1980.
They're both crap thou......
"over 300hp with these heads ported and polished!!!!" WOW!!!!! Feels like my feets are half way off the ground!!!
I seem to recall a dyno test on a 350 with these heads makeing a
big 336hp.
They're both crap thou......

"over 300hp with these heads ported and polished!!!!" WOW!!!!! Feels like my feets are half way off the ground!!!
I seem to recall a dyno test on a 350 with these heads makeing a
big 336hp.
Last edited by F-BIRD'88; Aug 2, 2004 at 07:43 PM.
I know how to tell apart a lightweight casting head from a heavy casting head. Have been able to for years. It is a heavy casting 882. I have seen many heavy casting 882's. I have machined heavy casting 882's. I tell you it is a heavy casting 882. I can tell by looking at the 493 that it is a crap smogger head, the date stamping is 1971. The last year for high compression small block Chevies was 1970. You haven't told me anything I don't already know (unless you count your erraneous story about no such thing as a heavy casting 882???). I looked on several head sites that didn't list 493's, all I want to know is if anyone can tell me the intake and exhaust cc's. Other wise I am going to just check it myself with water. Not that big of a deal, just wondering if anyone had the info.
But please keep telling me there is no such thing as what I am looking at.
Martin
But please keep telling me there is no such thing as what I am looking at.
Martin
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