487 X head info - Chevy Nova Forum
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Old 9th-May-2011, 10:42 PM   #1
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487 X head info

I'm putting my daugters 68 together and the 350 I have has the 3973487X heads. They look to be 2.02 and when I looked them up its 1971 high performance app. or truck and pass. car. I was planning on have a set of the "hump heads" gone through for $400 but these look to be in great shape. Any idea how the two compare. Its going to be a mild 350 with performer cam, 600 holley, headers, stock converter with the 3.08 posi. Its a 2bolt main 350 and has some flattops in it. Thanks
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Old 10th-May-2011, 03:04 PM   #2
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Old 10th-May-2011, 03:20 PM   #3
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Camel humps would be better. Those 487x's are 76cc but I think the runner is @10cc larger than a regular 487's. Pretty rare head you have. If you do use them make sure they have hardened seats in them.
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Old 10th-May-2011, 03:42 PM   #4
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They do have hardened seats. How much better is worth the $400 bucks to switch over?
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Old 10th-May-2011, 03:46 PM   #5
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A lot of guys on here will tell you to ditch the old heads all together and switch to Vortec's. It all depends on what kind of outcome you are looking for. The 487's will work fine on a daily driver.
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Old 10th-May-2011, 04:24 PM   #6
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A lot of guys on here will tell you to ditch the old heads all together and switch to Vortec's. It all depends on what kind of outcome you are looking for. The 487's will work fine on a daily driver.
Yea Ive been told that. I have these heads (487's) and the camel humps (3 sets) so I would like to use something off of my shelf for a change. Its just a mild 350 for my daughter. So I was more looking to compare between the two.
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Old 10th-May-2011, 04:31 PM   #7
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I agree, it's a pretty rare head. I think my ego would tell me to run the old dogs rather than the Vortecs which seem like belly-buttons around here.

All things being equal the Vortec might make more HP, but that might actually be a funciton of the cc volume than the port design in your case.

Real world Dollars and Cents, I don't knwo what a new set of Vortecs cost with all of the extra items you need to install them, like intake or re-drill, rockers, valve covers, it all adds up. You kinda know your cost ong the old dogs.

I will conceed that the new Aluminum Vortec heads seem to be even more attractive. They take either intake AND either Valve cover AND are aluminum!

http://www.jegs.com/i/GM-Performance...oductId=749898



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Old 10th-May-2011, 04:54 PM   #8
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I agree, it's a pretty rare head. I think my ego would tell me to run the old dogs rather than the Vortecs which seem like belly-buttons around here.

All things being equal the Vortec might make more HP, but that might actually be a funciton of the cc volume than the port design in your case.

Real world Dollars and Cents, I don't knwo what a new set of Vortecs cost with all of the extra items you need to install them, like intake or re-drill, rockers, valve covers, it all adds up. You kinda know your cost ong the old dogs.

I will conceed that the new Aluminum Vortec heads seem to be even more attractive. They take either intake AND either Valve cover AND are aluminum!
Yea I have everything to build the motor so it wont be cost effective to switch to the Vortec's. Im leaning towards have the camels built and ussing those.
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Old 10th-May-2011, 05:50 PM   #9
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What work do the camels need? If it's just a car for your daughter to putt around in I wouldn't spend the cash. If the 487's are in good working order, use those. That's my 2 cents at least.
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Old 10th-May-2011, 08:09 PM   #10
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Hi guys

Just my opinions, but I would be very surprised if the 487x had any meaureable difference with a regular 487.

Personally I dont think they are all rare either.

The "X" head that I have seen that is better or rare are the 461xs.

I would say (for what its worth) that either of the 487s are probably my favorite of the early tapered seat spark plug heads.

If they are in good shape I think they make reasonably good low compression street head. I think they have induction hardened ex seats and I would look at those carefully for cracks.

Good luck

Jeff
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Old 10th-May-2011, 08:21 PM   #11
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What work do the camels need? If it's just a car for your daughter to putt around in I wouldn't spend the cash. If the 487's are in good working order, use those. That's my 2 cents at least.
Everthing shop next to me will do it all for $400 since I send business their way.
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Old 10th-May-2011, 08:28 PM   #12
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Everthing shop next to me will do it all for $400 since I send business their way.
jeff if those are good use them youre girl wont noitce the difference and your pocket will will stay fuller of ********$
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Old 10th-May-2011, 08:41 PM   #13
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I think your right Denny. I'll have the shop go over them and make sure there good to go. Hmmmm now what do I spend the money I dont have on?
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Old 10th-May-2011, 08:44 PM   #14
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I think your right Denny. I'll have the shop go over them and make sure there good to go. Hmmmm now what do I spend the money I dont have on?
jeff im sure you have an idea
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Old 11th-May-2011, 12:03 AM   #15
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