70 lwb 3/5 drop questions

[LagunaGlide]

I am planning to do a front brake conversion with 2in lowering spindles this spring, and thought while I was at it I would add lower springs in the front and rear. I think I want to go with a total of 3" in the front and 5" in the rear.

I was curious if shock relocation and an adjustable panhard are necessary to pull off 5" drop coils in the rear.

And just for fun if you would like to post pics of your 67-72 with 3/5 drop I would be more than happy have a look.