does anyone know where to get a shock size chart I am installing my home brew 4.5 inch lift sat but would like to get the shocks before

 

You could buy shocks made for the amount of lift you have.
Or you could put it together, flex it out, and measure what the extended and collapsed lengths need to be and buy shocks accordingly.
I prefer the latter option.

 

Monroe. Front shocks. From advanced auto. 59504. Monroe rear shocks. 59012. There exactly what you need for a 4.5 inch lift except on front shocks u need bar pin eliminatirs for the lower aide or just reuse the pin from factory shocks