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Old 03-25-2003, 05:56 PM
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Post 429 Exhaust Valves

Ok, I have a '68 429 Thunderjet.

I need some exhaust valves, my dad swears up and down that he can't find ANY anywhere because mid-way through 1968 the valves changed sizes.

Ok, so I call Napa. They list '68-'73 Thunderjet, but it doesn't say what size the valves are. My engine book also lists from '68-'72 as the valves being 1.655", and in '73 or so they went to 1.73".

What's the word from you fellas?




[ March 25, 2003: Message edited by: BigBlockBabe ]</p>

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Old 03-25-2003, 06:00 PM
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Are there any other heads you can use besides the 429 heads? Something old or new aftermatket? I'm sure you don't want to go spend extra money. Could you find any better flowing ones? Steve
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Old 03-25-2003, 06:05 PM
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Dude Steve, you don't know your 429 stuff, do ya?

These are the GOOD heads. They're high compression, sought after heads. I'm not getting any other heads...end of story.


:p
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Old 03-25-2003, 06:08 PM
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See, this is what happens when you have a mentally retarted person on this board. Steve
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Old 03-25-2003, 06:21 PM
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If you have your heads off measure the diameter and the length and groove style and have your parts store get a quote from either P.E.P or S.B.I. or maybe Manley, if you can't find them call 1-800-7276998 and ask for Tommy tell him Bob from North American in Flint, Mich. told you to call, he will get you a part no or interchange that you can use locally. Be sweet!
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Old 03-25-2003, 06:25 PM
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By the way I was talking about myself.....Don't want another "Kaylah" incodent. Sorry I couldn't help. I just figured that there might be some aftermarket heads that are cheaper.Kinda like the 5.0, so many heads for that sucker. Ok I am rambling. Steve
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Old 03-25-2003, 08:40 PM
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Your engine book is correct. Everything available is the 73/ size. -MANLEY- can cut theirs (stainless) down for you or you might go to a local machine shop and ask what they do for stock replacement.

The FORD P&A No. is C8SZ 6505-A if you happen across a set of NOS.
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Old 03-26-2003, 08:39 AM
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When we went and picked up the heads (at the shop), the guy was like "yeah, too bad you've already got valves, I can get good ones at a decent price."

So I remind my dad of that, and he just grumbled and walked off. Personally I think he's being difficult. The longer he doesn't have parts, the longer he can put off finishing my truck!
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Old 03-26-2003, 08:45 AM
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[quote]The longer he doesn't have parts, the longer he can put off finishing my truck!<hr></blockquote>

Get out that whip girl!
<img src="graemlins/spank.gif" border="0" alt="[spank]" />
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Old 03-28-2003, 03:24 AM
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After checking my old Federal Mogul and TRW parts books, the only real difference in the later valves is about .010 in length, if you are replacing them all that might be an option easily adapted. If you are only replacing a couple, you might check Kanters.I've got an extra pair of '68 heads that I'd let go, they've never been apart. I don't think I'll use them, I've had them since '73 and if I haven't used them by now I probably won't.

[ March 28, 2003: Message edited by: woodz428 ]</p>
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