C3 gearbox conversion

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Mar 5, 2008 | 08:50 PM

Sting 69

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Cruising

Joined: Mar 2008

Posts: 11

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From: Oakdale, (Sydney) New South Wales

C3 gearbox conversion

Does a Automatic C3 floorpan have a hole for a manual gearbox conversion or do you have to cut one.

Mar 5, 2008 | 08:57 PM

1981Z06Vette

Pro

Joined: Nov 2007

Posts: 741

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From: Woodstock GA

You will have to cut one.

Mar 5, 2008 | 09:30 PM

Sting 69

Thread Starter

Cruising

Joined: Mar 2008

Posts: 11

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From: Oakdale, (Sydney) New South Wales

Quote:

Originally Posted by 1981Z06Vette

You will have to cut one.

Thanks. Have found a car but is auto. I'm planning a BB conversion but would rather not hack up the floor.

Mar 5, 2008 | 09:44 PM

evalu8r

Racer

Joined: May 2005

Posts: 470

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From: Amelia Ohio

You'll have to cut it. Here what my 79 looked like when I did my conversion.
[IMG]

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Mar 5, 2008 | 10:15 PM

Sting 69

Thread Starter

Cruising

Joined: Mar 2008

Posts: 11

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From: Oakdale, (Sydney) New South Wales

Looks like a pretty neat job. I will probably have a look when I get the car. I plan on doing a chassis rest and build up a BB to slip in.

Mar 6, 2008 | 01:24 AM

birdsmith

Melting Slicks

Joined: Feb 2006

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From: Japan

I found quite the opposite when I converted my '70- the auto trans hole was a lot larger than it needed to be for the 4-speed shift boot. I made a small aluminum cover to bridge the gap between the existing cutout and the attach flange of the new boot.

Mar 6, 2008 | 05:04 AM

Sting 69

Thread Starter

Cruising

Joined: Mar 2008

Posts: 11

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From: Oakdale, (Sydney) New South Wales

I'm pretty new to the vettes so I'll see how things pan out. I think I may go with the M21 gearbox but here in Australia we have Tremec 5 or 6 speed boxes which can be made to fit in most cars. It will also depend on the diff ratio. Maybe like your 70 model the floor pan would be very similar to the 69.
We do have some corvette supplies here but if I can't get the shift,console etc. I will source it from the states. Thanks for the help.

Mar 6, 2008 | 07:56 AM

markdtn

Le Mans Master

Joined: Aug 2003

Posts: 7,720

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From: Chattanooga TN

May be wrong but I believe all 68-75 will have the large shifter hole that can go either way. When the metal floors started in 76, then the hole was more specialized.