I swapped the longblock in but am still using the carb/manifold/v-belt system from the old motor. I have almost everything necessary for the fuely swap except the engine harness, ECU, fuel pump, o2 sensors. I have read a couple of great articles where guys have done this in early 'stangs but haven't seen any done in 61-66 trucks.
Someone out there has done it and has picks (and also tech advice)...bring 'em on!