Dual case question for forward shift

[Huhwhye]

What do I have to do to put dual cases in my Truck if I have a forward shift T-case?  If the shifter is mounted in the trans how does that work?  My guess is to use my current case in the front.

I have a turbo truck so I believe my T-case is a 23 spline forward shift.  Then must I use a 23 spline rear case?  I do anyway, just asking

Thanks

[WHITE_TRASH]

Take the forward shift case apart and use the lowrange box.  Put a Mco7 on the back of it and another top shift case behind the whole works.  The only thing Id do is use a set of 23 spline 4.7's to match the 23 spline low box.

[Huhwhye]

Is the rear part of the turbo case different from other cases?  I mean would I want to keep the back half of the turbo case to use behind my top shift case or does it not matter?

[Hyena]

Yes, you need to put the forward shift case in the front.  You then need to get a 23 spline top shift case for the back and an adapter.  You will have to take you stock case apart.  the only different thing from the turbo then the regular is shaft splines.  Regular is 21, turbo is 23.

[WHITE_TRASH]

The only difference between a turbo case and a normal 4 cyl case is the input shaft.  Otherwise they are identical.  

[Huhwhye]

Great, thanks fellas.