You can use any of the big block bellhousings with any mount that puts the engine in the stock location. Cheapest mount setup is to build your own Direct Connection (DC) k-member (modified 73-76 small block K).
No you can't. I had a 11 inch bell housing, and it would not make the mechanical linkage work, if you are going to switch and use a hydraulic clutch, then yes you can use anything, but that looks stupid under the hood. Just my opinion.
Thats only the cheapest way if you know how to make it, and have the tools. I am guessing you will need a welder. I could be wrong. motor mounts are not too expensive. How do you make a K member work?
people told me to keep the 11 inch bell, and make elephant ears, but I think they look silly, again a personal opinion. I am also not a fan of fenderwells.
It looks beter if it looks like its suposed to be there.