I am going to do a 200R4 conversion this summer in my 65 with a 330 300ST. I've not seen it stated anywhere as to whether the torque converter bolt pattern on the flywheel is the same for these too different transmissions. I assume they are the same but you know what they say about assumptions.

 

I've got both the 330 flexplate and a 200R4 transmission. If someone else doesn't speak up first I can try holding the flexplate against the torque converter to see if they will match up. John

 

Lets give it a whirl. and I'm still coming to get that engine.