It's should you might buy a mount for it
yes, it will fit in
Will a 1998 3.8 mustang engine fit in a 2000 Mustang 3.8 engine?
No it will not.
No, it will not.
No.
Yes a 429 would fit into a 1969-1970 ford mustang without no engine compartment mods
yes
yes it will fit, but you need to get a crossmember from a 95 and it will go in there.
Yes.
yes
No, they will not.
Yes.