No, they are different
yes
A 1998 Jeep Wrangler does not have EGR.
Trim package
No, it will not.
You might have an issue with the 4wd shifter location, and the 93 has a foot brake instead of a hand brake, but it will probably go.
no
YJ to a TJ, no
yes
Yes
Yes
Will a 304 engine fit in a 1998 TJ jeep wrangler?
No, there was a body style change in 1997.