Thank you, I will try to post pics soon. I bought for my 510, I have an l20 with 240z bell housing and guts from a sx standard H pattern that Rebello did in the 80s. I was hoping it was a roadster plate. On the plate it says Nissan and N-8353 89-9 atusugi
also has these numbers 16e00, all character on pp are engraved including “Nissan”.. I’d be happy if I may use it for my car. I measured the back and converted to mm. Came out to 240mm. My brother saying it may be SR, or vg30.