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C5 seat in a C3?

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Old Jan 9, 2016 | 06:58 PM
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Default C5 seat in a C3?

I know I have seen some posts on here on this but, now that I need it, I can't find one. Any help would be appreciated..
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Old Jan 9, 2016 | 07:16 PM
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The seats are a good fit in our C3's. If you leave the C5 mounting brackets on they will bolt on but sit about 2" higher than stock seats. Swapping the C5 mounting brackets for the C3 ones just requires drilling new holes. I have done mine both ways but since having the seats sit higher is better for my wife's back after 2 spinal fusions I am using the C5 brackets bolted to the position that fits me best. The only time it is a bit of inconvenience is at stoplights when I either look over the top of the windshield or tilt down a bit to look through it. I'm 6' 1/2" so if under 6' the upper windshield support shouldn't block your view of the stoplights.

Last edited by gdh; Jan 9, 2016 at 07:18 PM.
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Old Jan 9, 2016 | 09:18 PM
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[QUOTE=gdh;1591287410]The seats are a good fit in our C3's. If you leave the C5 mounting brackets on they will bolt on but sit about 2" higher than stock seats.

The C5 seats I have are fully power, I haven't tried it but it sure seems like it would be too high. I'll try it out in the morning.
This is my wife's C3, she is short and needs one pillow under her butt and another behind her back with stock seats. So having the adjustable seat would make her happy and when she is happy, I get to spend more without any conflicts.

Last edited by Dale002; Jan 9, 2016 at 09:22 PM.
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Old Jan 9, 2016 | 09:34 PM
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I have mine bolted in so we can only adjust the seat back.
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Old Jan 9, 2016 | 11:09 PM
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Originally Posted by gdh
I have mine bolted in so we can only adjust the seat back.
I need to have fwd. and aft movement or my wife would not reach the pedals, for me it would be no issues but, she drives the car much more than me.

Last edited by Dale002; Jan 9, 2016 at 11:12 PM.
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Old Jan 10, 2016 | 09:49 PM
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I mounted the original seat tracks to the C5 seats (new holes drilled into the bottom of the C5 seats) with a 1/2" thick spacer. The seats are about 1" higher than the original seats and they still move forward and backward.

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Old Jan 11, 2016 | 01:03 PM
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I had to bolt mine directly to the floor - no front-back movement. They are MUCH better than the stock '70 seats. I tried using the C3 brackets but still too high.
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Old Jan 11, 2016 | 03:19 PM
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I ended up mounting it using the C3 tracks. Seat works great, I have fwd and aft movement as well as back retraction. Both my wife and I can seat in it comfortably.
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Old Jan 11, 2016 | 03:25 PM
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My wife can't reach the pedals - from the passenger seat! She won't drive it and I'm OK with that.
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Old Jan 11, 2016 | 03:33 PM
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Originally Posted by Raphiki
My wife can't reach the pedals - from the passenger seat! She won't drive it and I'm OK with that.
There was a time my wife wouldn't even get inside one but today she has her own and drives it at least once a week. My wife is short so, I had to make sure the seat move fwd. I got new seats for my C5 and coil overs, she got my old seats. Fair, I say!
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Old Jan 11, 2016 | 03:48 PM
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I won't comment on the price, but if you can't fabricate, Mid America makes a C5/C6 seat adapter kit for the C3

http://www.mamotorworks.com/Corvette...seats-657009-1
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Old Jan 11, 2016 | 11:24 PM
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Originally Posted by SLVRSHRK
I won't comment on the price, but if you can't fabricate, Mid America makes a C5/C6 seat adapter kit for the C3

http://www.mamotorworks.com/Corvette...seats-657009-1
That's crazy, Billet? Looks like a few pieces of aluminum welded together then grounded down. I just did what most said they've done. Drilled new holes on the seat base so the spacing would be 15.5, the tracks lined up perfectly with the original holes on the floor. Cost 1/2 hour of labor and 0 dollars. No fabrication!
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Old Jan 12, 2016 | 08:10 AM
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Originally Posted by Dale002
I know I have seen some posts on here on this but, now that I need it, I can't find one. Any help would be appreciated..
Much better seats then the originals.

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Old Jan 13, 2016 | 04:48 PM
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Originally Posted by SLVRSHRK
I won't comment on the price, but if you can't fabricate, Mid America makes a C5/C6 seat adapter kit for the C3

http://www.mamotorworks.com/Corvette...seats-657009-1

$260 Is way too high it you can do it by just reoving the seat braclets. Why not just Bolt it to the C-3 tracks like others have
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Old Jan 13, 2016 | 05:24 PM
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Originally Posted by gdh
Swapping the C5 mounting brackets for the C3 ones just requires drilling new holes.
Sorry for the stupid question....
Can you clarify this one for me? Would I remove the C3 brackets from my seats and add them to the C5's seats? Just need to drill new holes? then they would install to the rails on my C3 floor?

Thanks.... Not a big fan on my C3 seats....

Last edited by Tommy79; Jan 13, 2016 at 05:25 PM.
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Old Jan 15, 2016 | 08:44 AM
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Originally Posted by Tommy79
Sorry for the stupid question....
Can you clarify this one for me? Would I remove the C3 brackets from my seats and add them to the C5's seats? Just need to drill new holes? then they would install to the rails on my C3 floor?

Thanks.... Not a big fan on my C3 seats....
Yes, And may need a couple washers between the seat bracket and C-3 rail.
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Old Jan 15, 2016 | 10:16 AM
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Here's a write-up I did with my C5 seat install.
http://www.nwhoustonvette-rods.com/P.../C5Seats1.html
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