How hard/whats needed to change.....

That's basically what I did. My car was \6 3 speed on the column also. I ended up buying a rusted up 65 V8 cuda parts car that had a four speed to boot. It was a little easier for me. Don't forget if you go 360 make sure you get a 360 flywheel unless you rebuild the 360. If you rebuild the 360 you can have it internally balanced so that you can us any sb flywheel that is internally balanced.

Lee