I'm going to be clearancing my tunnel pretty soon but I don't have the subframe or engine in the car. Can someone give me some decent measurements and/or reference points in the bay so I can roughly locate my t56 bell housing l? Thanks.

 

This is what I used as a start while I was waiting on my trans:

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I followed the same guidelines but did not need the full 2" widening on the driver side. IIRC it was about an inch and even then the trans easily clears that side.

And use this Motorcraft SW5857 Backup Light Switch, the plug is on a 90 degree which fits in the tunnel.

 

Darn! One day too late on the request. I just had mine out for the clutch release bearing replacement yesterday.

 

I only went about 1.5" on each side.

You may also want to consider notching out the top of the trans tunnel near the top bolt of the T56. I had some interference there, others have as well.