Post some photos of your car, shifter, engine bay showing shift rod, etc... Not a ton of TR owners on the site, but it isn't too far off from the others in many regards so you'll have good help/suggestings here and a photo can tell a LOT.
As mentioned above, you can't beat the PBS shifter which both Greg and I use as our standard, however a retro fit is less than ideal as it requires removing your engine and trans plus a bit of fabrication that will be specific to your own build... Brandwood is a much easier install, but considered a distant 2nd to the PBS. A properly set up rod shifter can be awesome, but there are a LOT of "attempts" at a rod shifter than are terrible as well...