I believe there is an after 3.73 gear set. Try here
www.randysringandpinion.com
>From: mopar@xxxxxxxxxxxx
>Reply-To: mailing-list@xxxxxxxxxxxxxxxx
>To: mailing-list@xxxxxxxxxxxxxxxx
>Subject: IML: 1st/OD/final drive ratio
>Date: Mon, 28 Jan 2002 14:17:05 -0600
>
>
> There is a lower first gear, gearset avalable for 727 use. However
> it is not cheap. But then again, neither is an aftermarket OD unit.
> In the '60s the lower first gear was used for the heavy cars for good
> off line response in drag racing.. As such a sturdy trans is required
> as noted by D2, the spacing is radical and slamming a high powered
> motor into a higher gear at high RPM was a strain on them.. However,
> for our use in Imperials I think the use of the lower gearset would
> be a great addition.. I realise not many would wish to make that type
> of outlay in funds tho..
> D2, being as you have a '68 Imperial,which means an 8 3/4 rear axle
> ass'y, there is no 3.73 gear aval.. 3.23 3.55 3.91 4.10 etc..
> I would be curious as to what you call a "big" cam.. If you have cam
> specs aval I would be interested in seeing them.. If you have part
> number and manufactor I can look it up myself.. :)
> Thanks,,
> Robb
>
>At 01:53 PM 1/28/02 -0600, you wrote:
> >At 11:26 AM 1/28/2002 -0800, you wrote:
> >>Another alternative would be a deeper 1st gear that'll give me easier
>off
>the line starts for city and still the direct drive for the fwy.
>
> >Although this is up to personal preference, I would not like this that
> >much. There would be too much spacing between 1st and second for a
> >continuous acceleration. Also, the tall 1st gear can often be used as
> >passing gear at low speed, and you would loose this advantage with the
>"low
> >1st gear", although this conversion would be much cheaper than the GV.
>One
> >day, I will probably add this OD to my 68 sedan, along with 3.73 or 3.55
> >rear gears. This would be a perfect match to this car's "big" cam...
> >D^2
>
>
>
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