Otto,
The holes in these plates are 7-3/4" OC which forced me to lengthen the slots in the topper with a fine rat tail file, just a little more. Maybe 1/16-1/8"+ more. That is filing the outside ends of each slot. My other cars plate are 7" OC.
Craig
My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.