welcome to the '74 Challenger club
i'm starting to think more '74 Challengers survived than any other year.
by '74, disc brakes were standard equipment on almost everything, usually power too.
i think the only way you got manual steering is if you ordered it. almost all dealer lot cars came with P/S.
here's a tip, when disassembling the nose/grill. be very careful. the header is a fiberglass-ish piece and it's easy to damage. use plenty of PB blaster on the screws for the headlight rings. they are usually always rusted and you can ruin the tabs that hold the little j-nuts. also, don't pry off the trim piece that's around the grill, this it a sure way to destroy the clips. when the grill is off the car, use pliers from behind to squeeze the clips together and then use a small screwdriver in the front to pry it off. the trim you can buy repo, the clips, forget it. you on your own. i have a '72 and '74 Challenger, so i know what you can buy new and can't. looks like your missing the lower bright trim on the opening of the front valence. if you find one in good shape, buy it, and guard it with your life
i joke, but they are hard to find in nice shape.
good luck
Greg