HEY,I 'M NOT SURE IF THIS WILL HELP,BUT THERE ARE 5-LUG ROTORS ON THE MARKET THAT WILL BOLT DIRECTLY ON FACTORY PINTO SPINDLES.I HAVE A SET ON MY V8-80 MODEL.I BOUGHT THEM FROM A SPEED SHOP SEVERAL YEARS BACK.THE GRREAT THING ABOUT PINTO SUSPENSIONS IS THAT THEY ARE WIDELY USED ON STREET RODS WHICH THERE ARE COMPANIES BUILDING ALL KINDS OF STUFF FOR THEM.I'M GOING TO BE UPGRADING MY SYSTEM SOON WITH DRILLED/SLOTTED ROTORS. I FOUND A KIT THAT HAS 11"ROTORS W/THE CALIPERS THAT WILL WORK ON THE FACTORY SPINDLES.THE COMPANY NAME IS CLASSIC PERFORMANCE PRODUCTS. THEY ARE ON-LINE AT WWW.CLASSICPER FORM.COM THE ROTORS I HAVE NOW I BOUGHT OUT OF INDIANNAPOLIS,IN. I THINK... IT WAS RALPHS HOT RODS.