Turbo slant six torque converter

Bill, what year crankshaft are you using? The pilot hole in the end of the crank, changed size between 67 and 68. The transmission input shaft also changed size at the same time. If you have the early crank, I doubt you will find a converter "off the shelf", and you would have to run the early transmission. You can run the late trans, with the early crank, but it requires a custom converter (that is what I run). Most common is the late crank and late trans, converters.