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1979 l82 rebuild thoughts

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Old Apr 5, 2013 | 07:16 PM
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Default 1979 l82 rebuild thoughts

If I have it bored .030 over and .010 on crank, and use same heads w/ 2.02/1.60 valves, ... and install 10:1 pistons and bigger cam (270 or so) would that be much improvement or not a good combination?... On a budget guys

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Old Apr 5, 2013 | 08:10 PM
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Well... Any thoughts? Good improvements or bad combo?
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Old Apr 5, 2013 | 09:49 PM
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What is the difference in the 462624 heads on the L82 vs the 882s?.... Thanks
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Old Apr 5, 2013 | 10:14 PM
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that would help performance a bunch. if you can get someone to pocket port the heads you would be amazed how well it would run.
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Old Apr 5, 2013 | 10:18 PM
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Thanks.
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Old Apr 5, 2013 | 11:21 PM
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Originally Posted by kcat-fan
What is the difference in the 462624 heads on the L82 vs the 882s?.... Thanks
For what it will cost you for big valves porting surface guides etc you may want to set them aside and get some aftermarkets that will perform way better.
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Old Apr 5, 2013 | 11:25 PM
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the L-82 came with 2.02 valves , i don't think he needs bigger valves.
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Old Apr 5, 2013 | 11:39 PM
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The L82 has the 2.02/1.60 valves already. I'm a rookie at this so bare with my ignorance. Haha
I will have to rebuild after locking up the engine due to overheating. I will know more after I open up the motor.
I pray it's just crank bearings.
Plan on .030 bore. Turn crank .010. Considering bigger cam and 10:1 pistons. I not sure what I will have done to heads. I am still shopping for a set of used ones.
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Old Apr 5, 2013 | 11:42 PM
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Originally Posted by 7t9l82
the L-82 came with 2.02 valves , i don't think he needs bigger valves.
Agreed, but throwing $$ at an L-82 head for performance is not a very good move. These heads are prone to cracking, especially the L-82s.

I second aftermarket heads.
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Old Apr 6, 2013 | 12:05 AM
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I agree on the AM heads. I'm just trying to watch my money and hopefully get some decent gains with what I named. But I'm keeping my eyes out for some used AM heads. Any guesses on my gains from the above mods. I have true duel exhaust, t350, 3:55 rear
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Old Apr 6, 2013 | 12:27 AM
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Do you have to rebuild the motor now? If not, wait until you can afford heads. I think you'll find a minimum of 50hp over ported L-82 heads by going with a nice set of aftermarket heads.
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Old Apr 6, 2013 | 12:46 AM
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It will be a couple months probably before I rebuild. I'm hoping to find a used set of AM heads. If the engine isn't a loss and and I can afford it I would love to put new cam, heads, and rework the bottom end. That should get me about 100 hp I would hope. What you guys think 9:1 or 10:1 pistons?
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Old Apr 6, 2013 | 11:16 AM
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You didn't mention how much you want to spend but have you considered a 383 stroker kit? Crate?

Last edited by resdoggie; Apr 6, 2013 at 11:22 AM.
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Old Apr 6, 2013 | 11:25 AM
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Well I was hoping to spend under 2k on parts and machine work, which I can... Just want more a$$ in her... Like all of us.
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Old Apr 6, 2013 | 11:36 AM
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Maybe a 383 short block this year to get yourself mobile again and then more mods next year perhaps?
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Old Apr 6, 2013 | 11:48 AM
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Good thought.
383 will be weesy through the stock head etc but will still have more torque. When yo can afford it change the heads/intake to something nice and hang on!
not a fan of porting those crappy iron heads theres just not much there to be had..and they are still super old .
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Old Apr 6, 2013 | 03:57 PM
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If you overheated the engine there is a very good chance the heads are not rebuildable. Those smog castings are thin and prone to cracking.
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Old Apr 7, 2013 | 09:37 PM
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Thinking rebuild kit from summit for bottom w/ .030 bore of course, the Eldebrock alum. E-street Heads assembled, and I'm wondering what would be a good hyd. Roller cam? Will put my stock alum. Intake/qjet back on for now. Also thought of 383 kit. But I'll be happy with a stout 355 build. I really don't want too much for my th350. Sooo... What cam with that setup?
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Old Apr 7, 2013 | 09:50 PM
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i have same build youre thinking of, 355 L82 bottom end, dart iron eagle 180 heads. kb flat top pistons, L82 alum. intake, quadrajet, msd street fire hei, howards roller cam. 2000 bm converter.
http://www.summitracing.com/parts/hr...make/chevrolet
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Old Apr 7, 2013 | 09:50 PM
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Originally Posted by kcat-fan
Thinking rebuild kit from summit for bottom w/ .030 bore of course, the Eldebrock alum. E-street Heads assembled, and I'm wondering what would be a good hyd. Roller cam? Will put my stock alum. Intake/qjet back on for now. Also thought of 383 kit. But I'll be happy with a stout 355 build. I really don't want too much for my th350. Sooo... What cam with that setup?
Oops can't use a hyd. Roller cam with those heads.
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