340 crankshaft info needed

I picked up a fresh 340 engine as part of a deal. I am considering putting it in my 67 barracuda, but the crankshaft is for an Auto trans and I am running a 4spd and would like to keep it that way.
What options do I have to accomplish this - special bushings and such? I have read that some cranks are rough drilled already and can accommodate the input shaft others not. how can I tell? drilled depth?