AMIGO FNDRS AND RODEO HDLGHT

I HAVE A 91 ISUZU PUP AND WANTED TO KNOW IF U HAD TO CHANGE THE CORE SUPPORT FOR THE HEADLIGHTS 2 WORK FROM A RODEO AND ABOUT THE FENDERS WHAT FENDER DO U USE TO BOLT ON FOR THE 4WHEEL DRIVE FNDERS AMIGO OR RODEO?