8 3/4 help!!!

Just got a b body 8 3/4 , which I am going to put in my 65 Valiant ( narrow a body) LBP using a 742 pumpkin ( open for now)

These axle's have a nut with cotter pin on the end of them .. Is that right?
Don't know much about them...

Info anyone..

I am going to move the spring perch's in from 44 to 43 inches and use a different back space( i hope, to allow this slightly wider rear end to fit . 59 inch outside flange to flange


Once I am done switching to LBP, anyone have interest in a set of sbp 14 inch wheel vintigues rally's with caps and trim rings?

Thanks