That isn't the only option. As others said, one can get a custom-made torque converter w/ a smaller snout. I recall posts where people listed a manufacturer who made that. People have wondered if there is enough meat on a later TC to machine the snout down to fit, and perhaps that is how they fabb'ed it. Another option people have mentioned is to swap both the torque converter and front components (input shaft, pump, fwd drum) into a later transmission. The advantage is probably that those parts are small enough to ship affordably. Of course, if you can find a pre-1968 small-block transmission locally, that would be ideal. 1964 & 65 tranny's are cable-shift and have a fixed output flange (instead of sliding yoke), which might be harder to retrofit in a truck, so a 1966-67 tranny might be best.
