Are the cast iron L98 heads identical to the aluminum L98 heads, or is ther some flow differants.also are the bolt angles the same on both heads. i need some good heads for my 406.

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when the green flag drops the bull$hit stops

Curent: 350,performer RPM intake ,650dp, 700r4, headers, 3inch exhast
Spring 01: 406, Comp 282 solid cam, 2400 stall converter, every thing else the same.

[This message has been edited by GOLD85 (edited January 07, 2001).]

 

Not sure about differences in flow, but I do know that the aluminum L98's have 58cc combustion chambers as opposed to 64cc on the cast iron ones and pre-87 carbeurated style intake bolt angles.

-Mark W.
'88 SC Camaro w/ 305 TBI

 

The Aluminum L98 heads flow better than the iron ones, but for a 406 I'd definitely get the AFR 190 heads.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
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