8 3/4 suregrip

There are both BOLT Patterns for the 8 3/4 available.
That in itself does not mean it's not necessarily for a "B" body.
I am looking for a 4.5" bolt pattern anyways....

I guess I should also ask for the following additional dimensions;
Length Overall...?
Distance between the Back-Plates...?
My 65 Cuda has the following approx. dimensions now;
C to C on the Spring Perch - 43.25"
Inside Hub to Inside Hub - 52.5"
Back-plate to Back-plate - 50.75"

Hopefully it will be close...
I found one with a 56" Hub to Hub - won't fit....lol