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  #16 (permalink)  
Old 05-24-2008, 05:37 PM
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I would retire the #185 heads in favour of a more modern/powerfull entry level performance cylinder head.

Edelbrock Performer RPM

Brodix IK200

Summit #162111 200cc S/S aluminum heads (64cc only)

Dart Pro 1 200cc or 215cc port

AFR 195 Street Eliminators work very good if you can burp the wallet a bit more.

I would go with a GM 5.7" rod. New or rebuilt with ARP bolts. A few rod bolt heads will require minor cam lobe clearancing grinding to clear the camshaft.

A "pump gas 400" (92 octane) needs a 10:1 cr.
a 64cc head requires a 18cc to 21cc dished piston
a 70+cc -76cc head can use a flat top piston.

The stock GM 400 crank is fine but will need to be rebalanced.

Use a Edelbrock performer RPM manifold and 750-800cfm carb Your Edelbrock EPS manifold is fine. May want a 1" divided (dual plane type) carb spacer for best results. I would avoid a open spacer on this one.

Something like a Comp cams XE284H-10 hyd cam makes a great "street machine" cam for a 400 SBC. Needs a 3000-3200 stall converter and a bit of gear. 3.73 is good.
Nice street machine power and cool rough idle but still easy to live with.
With 1.6:1 rocker arms (.544" max lift using the comp Xe284H-10) you'll need to use the 1.43"-1.47" medium diameter performance springs.
If you buy assembled heads check the part number when ordering.
Don;t forget to drill the heads decks for the 400 coolant steam holes.

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Last edited by F-BIRD'88; 05-24-2008 at 05:44 PM.
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  #17 (permalink)  
Old 05-26-2008, 12:02 PM
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Since this is an externally balanced engine, would it need to be "balanced and blue-printed"? Or is that a mute point?
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Old 05-26-2008, 03:10 PM
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Here's a good tutorial for those of you interested in drilling your own steam holes in non-400 cylinder heads for use on a 400 block......
http://www.gregsengine.com/350to400.htm
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