Hey Gilbert -
So I just dealt with this. I had to replace my Barracuda's 225 with a donor engine while rebuilding. Got a 1967 slant 170 that has the smaller pilot hole on the crank and couldn't take my 1968 torque converter. So I bought a hybrid that has the 1967 nose and the 1968 rear ("factory high stall"), that mates to a 904.
Anyway, how soon do you need the TC? I'm going to be building the 225 over the next few months and when it's done, will take out the 170, and will no longer need the hybrid TC.
If you need it now, I called Dacco at 1-800-443-2226 and they had it out to me in about a week for like $150 or so.