Honestly for a question like this you are better off starting a “fresh” post as the original post gets more attention than your question.
Getting ready to drop a 340 with W2 heads and 509 cam in my 72 Demon. will be 4 speed. Stock bellhousing or Quick Time?
I Dont see any reason to use anything but a stock bellhousing on this build. Back in the 1970’s when I started running 11’s I put a Lakewood bellhousing on my 340 and I spent a week on my back under the car with offset dial pin’s getting it centered. What a pain in the butt. Good luck.