Yes if its stock no headers?
YES. That would be a direct swop / bolt in.
I'm not sure how much bigger than a 454 you can put in it, but a 350 will definitely fit in it, as I'm sure you already know, along with the 454.
Absolutely.
Yes, I have one sitting in the driveway.
YES it will fit right in.
No, they will not.
Ford never made a 350 motor
will a 300 honda motor fit a 350 honda rancher
You'd have fewer complications if you stick with 86 and older.
yes it will need no mods to fit either
because a 350 is a larger motor than the v6
yes