> I thought I might
> have small disks, but the slotted disks I have are 10- 3/4".
That's the size of the later TR4-TR6 rotors; original TR3 rotors were 11".
The TR4-6 mounts also move the caliper closer to the axle, but I'm not sure
by how much. The calipers changed at the same time, so may not be strictly
comparable.
> Are there different caliper mounts for TR3?
Not from the factory, although the later mounts will fit on the TR3 vertical
links.
> Trans mounts--I'm using the OD trans from the Ambro. Looks like the
> transmission mount is a little aft of normal, though I haven't stuck a
> mount
> in there yet to check. Anything special needed? I assume I need a shorter
> driveshaft. Yes/No?
As TeriAnn said, the 4-synchro box is a bit longer than the original
3-synchro, so slot the mounting holes in the rear crossmember. ISTR I also
rolled down the lip on the crossmember a bit, but that may not always be
required.
Depending on which gearbox, you may also need to fiddle with the clutch
linkage. I used a late TR6 box with the thicker flange, which moved the
clutch slave back by 1/4" or so. I had to trim the pushrod to match, and
make a bracket for the return spring. Also longer studs & bolts for
mounting, but that's trivial.
Randall
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