i agree with the 2.5 cowl over 4. 4 is too much. it just looks goofy.
4.10s are a great gear, what i have in mine now. was thinking of doing 4.56s and 28 inch tires, but just throwing a whipple on her.
are you auto or manual? if manual get a MGW shifter. the hurst is a nice looking piece, and thats what attracts most people, but its notchy feeling, and you really gotta be forceful to get it into gear.
also k member brace with tq limiters is a great buy from che. for the price you can't beat this solid piece.
i'd recommend an adjustable panhard bar, lower control arms, anti squat brackets, and an adjustable upper control arm, with new mount. in my opinion the rear suspension is the one let down with these cars.
as for exhaust, i dont know how involved you wanna get, but the set up i'm planning on is kooks long tubes, offroad x pipe with cutouts right at the collector on the headers, with magnapacks for a muffler.
what finish foose did you buy? and what color car? can't wait to see them mounted up.