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corvette aluminum heads casting #1008113

 
paulh12
I love my Chevy Chevette!
Posts: 7
Joined: 05/13
Posted: 05/22/13 08:58 AM

Hi, I'm a newbie, not young in age, but a newbie to this forum. I have a question concerning a 350 block I bought, that is punched out 10 over which I'm guessing is now a 355. It has 13 to 1 Venolia pistons, with aluminum rods, forged crank, and a 620 lift cam. I have been giving a set of corvette aluminum heads, casting number #1008113, 1.94/1.50 valves, 85cc. Will these heads work with this setup, or should I go with bigger heads, like 2.02s' or so.? It's been years since I have rebuilt an engine, but I do want to build this engine and then put it in something light down the road. Any help or advice would be greatly appreciated and I look forward to hearing from you. thank you in advance...Paul.  Smile  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 05/22/13 09:23 AM

im seeing those heads as 58cc.   was the 85cc a misprint?     depending on what you have now, it might bring the compression up higher.

  which 350 do you have?    

   most likely you can have 2.02" valves installed.

  heres a link for casting numbers.
http://outintheshop.com/faq/casting/castings2.html  

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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 05/22/13 05:05 PM

Like Joe said you can have the bigger valves installed. I put 2.02 and 1.60 valves in my 95 Camaro along with some mild port work. With a cam roller rockers I picked up 6 mph in the 1/8th mile. Went from 80-86mph. This is the best indicator of HP increase. I would estimate it took about 50hp to pick up that much MPH. ET depends on other factors but mph can be pretty consistent even if you have a inconsistent 60' time.  
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paulh12
I love my Chevy Chevette!
Posts: 7
Joined: 05/13
Posted: 05/27/13 02:08 PM

HI, yes I did mis-type, they are 58cc heads. The block casting number is #8970010. I take it that a good machine shop would be able to set these heads' up to accept 2.02/1.60 valves, right? What kind of cost do you think that would run? I want to take them in anyways' to be checked for cracks and trueness. What do you think for a manifold, tunnel ram or a good airgap like a Victor Jr. or something? Also, what length valves' should I go with, standard or +100. I'm looking at getting stainless steel valves and double valve springs that will handle the 620 lift cam. Thank you for replying and look forward to this forum often.  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 05/27/13 08:24 PM

You'll spend so much setting up those heads that you'll wish you had bought aftermarket aluminum after the bill is paid. Made that mistake once, for another $300+/- I could've had a set of Edelbrocks.  
68scott385 68scott385 68scott385

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paulh12
I love my Chevy Chevette!
Posts: 7
Joined: 05/13
Posted: 05/29/13 05:24 AM

Thanks, I kind of thought the same thing. And I'll be sure to get the right setup. I have another question if anyone can help. I'm pro streeting my 84 Chevy C10 short bed and have 33 x 21.50 MT sportsmans' going on the rear, Bias-ply. I see most pro streeted C10s' on ebay being sold with radials on the front. In my day you couldn't mix bias with radials. Has this changed or am I missing something? Thanks again for the 350 info. Look forward to continued conversations...Paul.  

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zman123
Everything in my driveway’s a Chevy
Posts: 537
Joined: 06/08
Posted: 05/29/13 06:09 AM

the info you have is correct, do not mix bias ply and radials. They make fat radials that will do just fine.  

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paulh12
I love my Chevy Chevette!
Posts: 7
Joined: 05/13
Posted: 05/29/13 01:26 PM

Thanks zman for the info. I think I'll go with bias-ply for the front, it'll be cheaper. Wink  

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busterrm2013
V-6 Camaros rule!
Posts: 46
Joined: 07/13
Posted: 07/21/13 10:37 PM

Yes, you could use larger valves, those seats if not worn real bad can possibly be cut to take a 2.02/1.6 valve. I have done it before and had good success. If your compression is that high I would at least cc the chambers to even them out. I might suggest getting new pistons to bring the compression down some. Unless your going to use pure racing fuel.
Might be a good idea to port them some to allow for more flow, at least behind the valves.  

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