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Joined: Dec 2003
Posts: 188
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Joined: Dec 2003
Posts: 188 |
Bought a rebuilt head the other day for $20 with an option for the second head (when the guy finds it)the stamping on it says "093" ? The guy says it will fit a 389 or 421. Anyone have any info on it and will it fit any Pontiac block?
Gerry
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Joined: Dec 2003
Posts: 188
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Joined: Dec 2003
Posts: 188 |
Cool. Thanks. Any idea on what kind of compression and or hp rating and what cam would match these heads? I think I may have to chase down the other one fairly soon when I get back from Fort St John (can you say way to far north?). The guy has a machine shop with all kinds of old heads. I'll have to see what else he has as well.
Gerry
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Joined: Sep 2004
Posts: 1,715
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Joined: Sep 2004
Posts: 1,715 |
High compression on the 400-421/428. Probably in the range of 10. They're for older blocks, and have valve angles that are different than the later blocks. If you run a huge cam you could run in to interference problems.
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Joined: Mar 2004
Posts: 11,905
Valued Mentor
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Valued Mentor
Joined: Mar 2004
Posts: 11,905 |
Wallace Racing shows the heads to be 1966 GTO, 389 335hp or 360hp, and 421 356hp or 376hp. They have small intake and exhaust valves, 1.92/1.66.
Should be about 68cc stock chamber volume.
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