What do I need to get for a rear end swap?

[Big Port Jimmy 6]

As I remember you have a 54. The spring pin center line is offset to the front in your springs. If you look at the stock rear end it has pivots that allow it to move with the closed drive line. You need to make some plates to move the pin back. 1/2 plate with a 3/8 Allen bolt screwed in an a hole to put the spring pin in. You will need some new bottom plates since the Nova rear end has wider perches. Jay