68 327 block. 882 heads
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Joined: Oct 2010
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From: bellingham WA
Car: 85 Z28
Engine: 327
Transmission: 700R4
Axle/Gears: 3.23
68 327 block. 882 heads
I have a 327 block with 882 heads. Frome what I have read these are crap. I need to replace a head gasket anyways, maybe, because I have a lot of pressure in cooling system. Though from what I have read about these heads , they may be the culprit. Anyways I am wondering if it is even worth it on the 327. I don't have a lot of cash, so I would be looking at cheap decent heads that I don't need to mess with too much. Such as different intake or anything. Any help, thoughts, opinions would be great.
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Joined: Oct 2010
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From: bellingham WA
Car: 85 Z28
Engine: 327
Transmission: 700R4
Axle/Gears: 3.23
Re: 68 327 block. 882 heads
So with that what would be some decent , budget heads ( what casting numbers) . I also was thinging that by time I do what I need would it be cheaper to by a running 350?
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Re: 68 327 block. 882 heads
If the 327 is installed and working satisfactorily, no reason not to repair it. As long as its rings are good, oil pressure is good, and so forth.
Assuming it's a stock motor with flat-tops, .the usual 025" stock deck clearance, .039" gasket, 6c valve reliefs, and 76cc chambers, your CR is very close to 8.0:1. It'll be well down in the 7s if it's been rebuilt, with the extra .020" of deck clearance that comes with that.
441s will keep the same pitiful situation. Buyijng random junk heads off CL at bottom dollar is a recipe for risk; doesn't matter how cheeeep they are, if you end up having to buy heads twice. Not the best idea. Keep looking.
64cc chambers will bring the CR up to 9.0 or 9.1:1. 58cc chambers (305 heads) will bump it up to almost 9.7:1 if it's still OE, or about 9.2:1 if it has the "rebuilder" deck clearance (most likely).
That's what I'd put in it if I had to buy heads. Yerbasic 416 would be perfect. Shouldn't be too hard to bop on down to yer local corner parts store and pick up a pair, worked and ready to roll, for less than $300. Prolly less than $250.
Assuming it's a stock motor with flat-tops, .the usual 025" stock deck clearance, .039" gasket, 6c valve reliefs, and 76cc chambers, your CR is very close to 8.0:1. It'll be well down in the 7s if it's been rebuilt, with the extra .020" of deck clearance that comes with that.
441s will keep the same pitiful situation. Buyijng random junk heads off CL at bottom dollar is a recipe for risk; doesn't matter how cheeeep they are, if you end up having to buy heads twice. Not the best idea. Keep looking.
64cc chambers will bring the CR up to 9.0 or 9.1:1. 58cc chambers (305 heads) will bump it up to almost 9.7:1 if it's still OE, or about 9.2:1 if it has the "rebuilder" deck clearance (most likely).
That's what I'd put in it if I had to buy heads. Yerbasic 416 would be perfect. Shouldn't be too hard to bop on down to yer local corner parts store and pick up a pair, worked and ready to roll, for less than $300. Prolly less than $250.
Last edited by sofakingdom; Dec 10, 2010 at 07:59 PM.
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Re: 68 327 block. 882 heads
Shopping for used iron heads these days isnt worth it. Know thatmost are 40 yrs old!! Cracks are a huge possibility they have probably been rebuilt more than once no telling if they need or can handle another. 20 yrs ago you could get fresh sets anywhere today it isnt worth it.
When you get your heads/intake if need be look into a cam to match
Google EQ cylinder heads they have some cast iron ones that arent half bad without spending a ton. Theres always the Vortecs but need a specific intake. THere are a number of Vortecs too, not all of them are desirable.
Pace Performance parts, GMPP, Scoggin Dickey etc sell them.
A GM 113 head would get you into an aluminum head with 58cc chambers. Only thing is they dont flow much without sinking a bunch into them. If youre not worried then that MAY be an alternative. Remember its a 20 yr old head so they may require some work ie valve job guides/surface etc.
Try and save, get new whenver you can .
327 is a good little motor.
When you get your heads/intake if need be look into a cam to match
Google EQ cylinder heads they have some cast iron ones that arent half bad without spending a ton. Theres always the Vortecs but need a specific intake. THere are a number of Vortecs too, not all of them are desirable.
Pace Performance parts, GMPP, Scoggin Dickey etc sell them.
A GM 113 head would get you into an aluminum head with 58cc chambers. Only thing is they dont flow much without sinking a bunch into them. If youre not worried then that MAY be an alternative. Remember its a 20 yr old head so they may require some work ie valve job guides/surface etc.
Try and save, get new whenver you can .
327 is a good little motor.
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Joined: Oct 2004
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From: SE, Ohio
Car: '86 Z28, '91 RS
Engine: 305ci, 305ci
Transmission: TH200c (no kidding), TH700r4
Axle/Gears: 2.73, 2.73
Re: 68 327 block. 882 heads
If you still have the original 305 out of your car you might have a pair of 416 heads already. If that's the case get a full set of 1.94, 1.6, stainless valves and have them installed with a performance valve job. That would set you back about $300.
Personally I would swap the cam while I had the motor torn down but it's not as simple as torquing head bolts. There's much more to it so it's not for everyone but if you have time and patients go for it. It would require a bit more investment but well worth it IMO. Besides the cam and gaskets you'll need timing chain, lifters, and valve springs. Check pushrod length.
Highly consider aftermarket rockers now or soon after this point. Check pushrod length again.
After you've done all that you can/should consider a intake manifold upgrade.
Personally I would swap the cam while I had the motor torn down but it's not as simple as torquing head bolts. There's much more to it so it's not for everyone but if you have time and patients go for it. It would require a bit more investment but well worth it IMO. Besides the cam and gaskets you'll need timing chain, lifters, and valve springs. Check pushrod length.
Highly consider aftermarket rockers now or soon after this point. Check pushrod length again.
After you've done all that you can/should consider a intake manifold upgrade.
Thread Starter
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Joined: Oct 2010
Posts: 885
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From: bellingham WA
Car: 85 Z28
Engine: 327
Transmission: 700R4
Axle/Gears: 3.23
Re: 68 327 block. 882 heads
I don't have the original motor. I have time and patiance, just not a lot of money. I do have a perfomer intake on it right now. I am getting ready to also rebuild my carb. Just want it all to be done by spring. I found a guy who rebuilds heads selling 305 heads for 200. I don't know what cast numbers yet. What all head " internals " do I need to replace?
Senior Member
Joined: Oct 2004
Posts: 965
Likes: 2
From: SE, Ohio
Car: '86 Z28, '91 RS
Engine: 305ci, 305ci
Transmission: TH200c (no kidding), TH700r4
Axle/Gears: 2.73, 2.73
Re: 68 327 block. 882 heads
Shopping for used iron heads these days isnt worth it. Know thatmost are 40 yrs old!! Cracks are a huge possibility they have probably been rebuilt more than once no telling if they need or can handle another. 20 yrs ago you could get fresh sets anywhere today it isnt worth it.
When you get your heads/intake if need be look into a cam to match
Google EQ cylinder heads they have some cast iron ones that arent half bad without spending a ton. Theres always the Vortecs but need a specific intake. THere are a number of Vortecs too, not all of them are desirable.
Pace Performance parts, GMPP, Scoggin Dickey etc sell them.
A GM 113 head would get you into an aluminum head with 58cc chambers. Only thing is they dont flow much without sinking a bunch into them. If youre not worried then that MAY be an alternative. Remember its a 20 yr old head so they may require some work ie valve job guides/surface etc.
Try and save, get new whenver you can .
327 is a good little motor.
When you get your heads/intake if need be look into a cam to match
Google EQ cylinder heads they have some cast iron ones that arent half bad without spending a ton. Theres always the Vortecs but need a specific intake. THere are a number of Vortecs too, not all of them are desirable.
Pace Performance parts, GMPP, Scoggin Dickey etc sell them.
A GM 113 head would get you into an aluminum head with 58cc chambers. Only thing is they dont flow much without sinking a bunch into them. If youre not worried then that MAY be an alternative. Remember its a 20 yr old head so they may require some work ie valve job guides/surface etc.
Try and save, get new whenver you can .
327 is a good little motor.
These are bare so they need the works; http://cgi.ebay.com/ebaymotors/CHEVR...Q5fAccessories
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Joined: Oct 2010
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From: bellingham WA
Car: 85 Z28
Engine: 327
Transmission: 700R4
Axle/Gears: 3.23
Re: 68 327 block. 882 heads
Bring this back. So I have decided to go with the 416 heads. They seem to be the best foor the price. With that said. What cam(s) should I be looking towards and what should I upgrade in the head such as rods or rockers, and maybe what maching to the head, assuming they are ready to bolt on now as is, to improve them.
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If you are going to replace the cam, get lifters and timing set at the same time. New valve springs would also be a good idea, and I'd get retainers as well in order to eliminate the exhaust rotators. If your budget will allow it, have the heads machined for 1.94" intake valves. You shouldn't have to shave them unless the gasket surface isn't flat. Make sure the guides are in good shape, and now would be the time to replace the stem seals.
Since budget is an issue, and it doesn't sound like you're trying to build a barn-burner, a Summit brand cam kit should suffice. This one looks decent http://www.summitracing.com/parts/SUM-K00052/ . Although a dual pattern would be nice, it probably isn't necessary.
Stock rockers should be fine, although some would say replace them. Again, Summit brand stuff will suffice. These have roller tips, which helps reduce valve guide side-loading and wear. http://www.summitracing.com/parts/SUM-141506/
Non-roller-tip will be about half that price.
If you're replacing lifters and rockers, it's cheap insurance to get new pushrods while you're at it.
Since budget is an issue, and it doesn't sound like you're trying to build a barn-burner, a Summit brand cam kit should suffice. This one looks decent http://www.summitracing.com/parts/SUM-K00052/ . Although a dual pattern would be nice, it probably isn't necessary.
Stock rockers should be fine, although some would say replace them. Again, Summit brand stuff will suffice. These have roller tips, which helps reduce valve guide side-loading and wear. http://www.summitracing.com/parts/SUM-141506/
Non-roller-tip will be about half that price.
If you're replacing lifters and rockers, it's cheap insurance to get new pushrods while you're at it.
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Joined: Oct 2010
Posts: 885
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From: bellingham WA
Car: 85 Z28
Engine: 327
Transmission: 700R4
Axle/Gears: 3.23
Re: 68 327 block. 882 heads
Thanks for that info and advice. Now do you think those would be the best K budgetK headss for my motor??
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
With options as budget allows as described above.
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