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This is with a GM 3550 Tremec and the shifter in the middle position. The bench seat is all the way forward. I did some welding to make the shifter handle compatible with the Tremec but I think the newer ones are ready to go.

I do not know the dimensional differences between the 3550's and the TKO's which replaced them. I think the Tremec website has both dimensions.


This is the 3550 before I bought the relocation kit to move the shifter to the center position.
 

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You can move the shifter to almost any position you want. You do not have to work off the shifter connection that comes with the TKO. They make aftermarket replacements . Call AMP Performance 800 454-8387 and talk with Tom Thompson he is the owner. You will need the measurements of where you want to move your shifter from stock position. In other words, 2 inches to the left and 3 inches forward or what ever you want.
Good luck!!
Jeffrey.
 

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Previous owner hacked up the tunnel in my '56 150 sedan putting a turbo 350 and B&M shifter in it.






My '55 convertible was getting a new floor so I took the tunnel from it and butt welded it into the '56.














I cut a hole that fits tightly around the shifter because I want to use a small round boot. The shifter is in the rear position and is flipped around. It fits great with the factory bench seat.
(No bucket seats in my cars)







.
 

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This is an older picture of my interior (I no longer have those gauges, that tach or steering wheel or aluminum in the speaker "V").. the Tremec shifter is in the rearward position. If you look closely I have a very slight curve on the front of the bench seat. I used a standard Hurst bar bolted to a Steeda "short throw" shifter that was MUCH better than the stock 3550 Tremec. I think the more modern TKO series has a better shifter. I put a very slight bend on the shifter bar putting the knob/ball towards the drivers side an inch or so just for comfort. I always keep the seat all the way back to accomodate my long legs. It shifts pretty good with this set up.

 

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TKO 600 with a Luttys 59 Impala sphagetti shifter and repro boot. Second picture is with a "nicer" Lokar boot and trim ring. Tuft of carpet sticking up is where the previous 4-speed Muncie stick came through. Seat can move forward 2 notches from the rear most position.



 

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Here's some pictures with a 409 spagetti shifter arm, later switched out for a Hurst shifter arm.

The shifter itself is a short throw unit I got from AMP. Maybe Blackjack? It's turned 180 degrees so it's in the front position.





 

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Current pics of our tremec install. '57 150 two door wagon. Is there an award for who has the worst hacked shifter hole from previous owners? Ours may be in contentionLOL. This TKO600 has shifter in middle location for bench seat. Ugly shifter boot in 3rd pic will be replaced by something more suitable. In the process of finishing tunnel patch, doing some brake line and hydraulic clutch plumbing.
 

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Tremec T56 Magnum




Seat all the way forward, shifter pulled back:




Seat all the way back, shifter back:




Tunnel shape - I used a dead blow and a plastic hammer from underneath with a sandbag laying on top. I slowly pounded to stretch it into the shape I needed for clearance. This was the first hole that had ever been cut for a shifter in the tunnel. Also, I cut off the pinchweld flanges all the way around the underneath radius of the tunnel/firewall seam and welded the seam from the inside.
I performed this process while I ready to lower the body onto the frame. This allowed me to raise/lower the body as needed to check/recheck the clearances as I shaped the tunnel.





 
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