the old timing lights wouldn't give you a red lite until the light shined thru the wheels and hit the elect eye again the second time . Joe Davis figured that out on his funny car mustang ,Colt 45 and ran moon hubcaps and wheelie bars to keep the light out , then he off set the front axle. so both wheels rolled thru, one behind the other , before he would get a red light. there are picts on the web of his T bucker altered, Jewel T with Moon hubcaps so some of the strips kept the old lites for quite a few years. When competitors looked at his cars,, they would ask and he said with kids needing braces and college funds he couldn't buy a new chassis. just keep screwing with his old one so he could keep it on the track at 150 mph.