My 67 has 2.73 and it pulls real nice through first and second and cruises comfortably down the freeway.

flemming, I come here to learn so I’m curious to hear back from you.

 

@young olds , I'm just some idiot that likes to bang gears and go fast on pump gas. The car has had a bunch of combinations:
-C clip 12 bolt, 4.11, M20- broke counter cluster in the burnout
-9" , 3.70, M22- fried multiple Centerforce clutches
The 9" has stayed.
M22W- worked very well, multiple user/assembly errors, switched to McLeod RST clutch
Now, it has a 22Z with the RST. It's currently getting a Gear Vendors overdrive added.
You can ffwd to 34min for the carnage. Finnegan split 1st off the countershaft. Granted, his car is 1000hp, BUT my late brother split 2 with half the power. I'll stay away.
That DN design trans has been around forever, and a lot of people love them.
There's another member here that blew 2nd out of a 5 speed, but I'm not sure which trans he was running. I think it may have been the Richmond T5 style.
Those are basically all of the reasons why I kept the Muncie and decided on a Gear Vendors. I was considering a T56 style 6 speed, but didn't want to butcher the tunnel. Hindsight being 20/20, it may have been better; I don't know.

 

I had a t56 in my 66 f85, really didn’t have to cut much. I ended up not liking the trans, was heavy and never used 6th. Ended up trading it for the st10 I’m currently using and love it. As for the doug nash, there are many different version from street, road course to drag( including one with a torsion bar output to soften the blow of dumping the clutch) I’ve even heard of some having magnesium cases. im sure they all handle different amounts of abuse.

 

Go for it as long as its done well there should be no down side.

 

So true !

Hurst Olds hammered that home in 1968 and 1969. GNX etched it in stone in 1987.

With that said Case442 i say go for it, and i voted swap to 4 speed manual. I feel you are looking for the extra revving and fun that comes with a stick, outside of consistent performance.

 

Originally Posted by matt69olds
I agree. It’s not 1965 anymore, the days are long past when automatics were slower and inferior to manuals.


Phil wrote:
So true !

Hurst Olds hammered that home in 1968 and 1969. GNX etched it in stone in 1987.
With that said Case442 i say go for it, and i voted swap to 4 speed manual. I feel you are looking for the extra revving and fun that comes with a stick, outside of consistent performance.
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Bernhard wrote:
Good points one could argue that the stick will be a slower than a properly built automatic with the right converter and rear gear selection.
Things that make automatics more fun to drive.
Manual valve body
Quality high stall converter
Taller rear gear 3:73 to 4:11
aftermarket shifter
you also have a choice of running a 2004R , T350 or the T400
Budget is another consideration a manual conversion will not be cheap.
Does the current T400 have a shift kit and a higher stall converter?
Another big consideration is the type of driving you are planning to do with the car as that will be a major factor in selection of components.





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