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Old 01-09-2018, 04:55 PM   #3
68Gold/white
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Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
Re: 400/406/409 Head suggestions

Quote:
Originally Posted by SilverMiner View Post
Here is what I'm considering purchasing:

Dart Iron Eagle S/S Cylinder Heads 10024360A
76cc chamber with 165cc intake runners

Cometic MLS Head Gaskets C5248-027
4.165 bore and 0.027 compressed thickness

Using Summit's compression calculator, this puts me right at 9:1.
But is it reliable to use the thinnest head gasket available? Are there any risks?
An alternative would be a 72cc head with 0.036 gaskets - better, or not?
Your head and gasket selections are spot on. Cam is good also. You don't need anything fancy for headers. 1-1/2" primary tubes are fine on this deal.

Would be nice if pistons were not as far down in hole. .040 total deck height is great number to shoot for, you will have .052, which is still good.

Has block been decked? If not it is always a good thing. But you don't want to end up much less than .035 deck height.

Make sure you check springs on new heads. Make sure you frill steam holes on new heads.

Your stud pulling ordeal was a combination of stronger springs and a more aggressive cam profile...

Hope it all comes together. I have a friend that had a 66 C10 with similar combo. It was a screamer!
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