4L80E installation in 67 Camaro

[Turbo67camaro]

I've now got a rebuilt 1999 4L80E that I'm planning on installing soon in my '67 Camaro. I've got a few questions to prepare for that:

What is the small tube on the top of the case for ? It looks like a vacuum tube. Being an electronic transmission, I wasn't expecting that.
After I had it rebuilt, I read some people use a short shift linkage shaft, because the stock one sticks out far. I didn't replace that piece. Anyone know if that swap will be needed in a 1st gen Camaro ? If needed, how difficult is it to replace ?
I'll be using a 1350 yoke. Anyone have tips on choosing one, especially regarding the length ?
There are 2 cooler line fittings - 1 front and 1 rear. Which one is output to the cooler and which is the return line ?
I've read about using a Sonnax 34918-01K 4L80E transmission cooler line conversion kit. If there's a better way to hook into the cooler fittings, please let me know.
If anyone has recommendations on a trans. cooler, dip stick & tube, or shifter, that would be appreciated also.Thanks,

Mike

[MarkB]

The tube on the top of the case is a vent, you can either leave it alone or hook a small hose to it and run it towards the rear of the case and point it to the ground.
The cooler fitting in the rear is the return line, do not replace this fitting with any fitting except for the sonnax line kit or the GM factory fitting. I recommend the Sonnax kit for ease of installation of the lines.
On the short shaft, we usually use the short one, but we have a '68 Camaro we are working on now and we kept the long shaft so we could use the factory neutral safety / reverse back up light switch. It is very tight with his 3" exhaust, but it is in there.
As for the slip yoke, use a spicer yoke, and ensure that you have it counter bored for the o-ring, unless it was built with a slip yoke style output shaft. If it had a bolt on yoke or an o-ring on the shaft you must counter bore the yoke to work. We keep them ready to go if you need one.
As for the cooler, I would recommend using a Hayden Tru-cool max 4739. On the shifter it really comes down to personal preference, we use the Hurst Pro-matic shifter and the B&M Pro Bandit on several or fabricate a late model shifter into the vehicle. On the fill tube as always I prefer to use an OEM fill tube and indicator, but a Lokar or Gennie will work fine, just take patience to fill them.

[Turbo67camaro]

The output shaft has a threaded hole in the end. Does that mean I have to use a bolt on yoke ? I'm wondering where I'll get front to rear movement when the rear end goes up and down with a bolt on.

The only cars I have prior experience with all used a slip on yoke.

Thanks for the help.

Mike

[MarkB]

You do not need to use a bolt on style yoke, you just need to ensure that your slip yoke is counter bored in the spline area to go over the o-ring on the output shaft. If you have more questions, feel free to e-mail or give us a call.