Here is an update on my TKX install. I just saw Dion's post looking up my old one. Thought I would share some of my pictures as I enjoy seeing other people's project photos.
Had a friend cut out my trans mount pieces with water jet. I scribed the OEM trans mount and changed the saddle dimensions to clear TKX rubber mount. Made cardboard template.
My preference is to have something in place of the material I cut out. So I welded a brace over the topside. I tied my new floor to the brace.
Since I removed the 4 speed hump I had a lot of floor to build so I did flats. It was easier for me than trying to have a rounded tunnel. My shift bezel will have a flat area to mount to. I also lapped my tunnel like the original 4 speed hump. Easier than butt welding.
I set the tail shaft at the same elevation as the 833.
If someone started out with an automatic floor there would be less work. As far as my car goes I believe a TKO would bolt in as I have a bit of room around the trans other than the torsion bar cross member area.
I think like the TKO the TKX speedo cable could be in a better location as it is in line with the trans mount and will be close to header maybe.
This tunnel will clear my bench seat.
I went with a juice clutch as I was going to big block and needed to change clutch linkage anyway. I installed a stiffener plate on my firewall a little bigger than the sandwich plate SST supplied with their master cylinder bracket. I was thinking it may need a brace? But the bigger plate made it a bit more solid.
Hoping to be able to get the tunnel and firewall seam sealed and painted this month. After paint work I will clean garage and continue assembly on the 451. This project will not be on the road any time soon.