I'm picking up a 400 next week to replace the V6 currently in my car. I understand that replacing the heads on this engine is the first thing I should be doing to help it make HP.

I have access to several blown out, late model caprices (former police cars) most of which have just bottom end damage. How good would these heads do on a 400? I know I'd have to get them drilled for the steam holes.

I can get the heads for almost free so I'd like to use them if they're any good instead of spending a lot of $$$ on aftermarket heads.

Any info you guys can give me is appreciated

Arawn1

 

I've heard of them being ported on a 350 to give 280HP. Its really a waste of a 400 though. If I had a 400 I'd get the best heads possible. It might be a good stop gap measure before you get new heads

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

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