g'day
I would go this way
https://www.classicveedub.com.au/cvd_new/parts.aspx?SearchData=struts
You need the last one - the 2 bolt
You need a shorter insert if you lower. The springs are ok (in my uninformed way) if you say go 1" or are part of a whole set up
Stock springs are under pressure when installed so when the front isnt under pressure (say going over a bump - when the front is on a "rise") the strut assembly is still "together"
I cant see how those lowered springs work with a non adjustable cup.
Those springs are not under pressure when you use them.
My adjustable struts you put the springs in and you adjust the cup till the spring is snug under extension
Does that all make sense??
As for the rear - do the front first and see how far the bum gets pulled up.
Lower the front and the bum comes up