It depends which truck it's going on-you have 2 listed in your sig-your '04 will have 4 wheel ABS, your '98 could have either-check the front hub assy(if it's the '98) and see if there is a skinny wiring harness plugged into the hub (like in the picture on the left) that runs along the spinde, frame, and then plugs into another harness right behing the headlight. The '98 will also have the PVH hubs, '04 does not.
On the '04 it's not a terrible job-just be sure to have plenty of PB blaster, a MAPP torch, 32mm socket, torque wrench, a 3-arm puller, and some patience. IIRC, the '98 will be slightly more involved.
'04 XLT SuperCab--4x4--4.0 Cammer--Auto--4.10 L/S--Leather Sport Buckets--OEM Pioneer 290W System--Billet Grille in FX4 Surround--aFe Magnum Force Intake--Bassani Lightning-style Exhaust--SCT X-Calibrator 2--Black Headlights & Corners--Extang FullTilt Tonneau--Herculiner--Cranked "1" Code Torsion Bars--NS'd '06 Tails--RS9000s--16"x8" Mickey Thompson Classic Locks with Blue Trim Rings--265-75R16 REVO2s--1" Body Lift-----SOLD
New Ride:2014 Focus ST