How do I change my recessed ’84-’85 headlights to the flush ‘86-’87 headlights?

From RPRWiki

This answer comes from the CRX Resource’s Steve Jones: You`ll need to remove the side markers and header panel (the plastic panel between the hood and the bumper, which also forms the headlight eyebrows. Parts you`ll need: `86-`87 headlights and buckets (these will bolt in), headlight connectors (cut these off the harness of the donor car), side markers, all associated brackets. The associated brackets include the two which hold the header panel in front of, and just to the inside of the headlights. On your car, these are straight pieces, oriented horizontal the ground, and aiming toward the center of the car at about 45 degrees. You`ll replace them with the S-hook shaped replacements from the donor car. Bring a cordless drill and plenty of high-speed carbon bits, when you go to the junkyard, as these are spot welded to the bulkhead. The s-hook shaped pieces are designed to go around the lip of the flush-mounted headlights. Your straight pieces will interfere. When you get home, you`ll find the old buckets are held in with spot welds. Drill these out to remove the recessed H4666 headlight buckets. You have the option of spot welding your s-hook shaped brackets, or drilling and bolting them to your car. Replace parts in reverse order. Cut the H4666 connectors off your car and replace them with the new connectors. These need to be soldered. Then, use good quality heat shrink for insulation, and follow up with some high grade 3M electrical tape for additional weatherproofing.