67 suspension height/drop question

[MySons68C20]

Original coils on front and 4" drop springs in back assuming you have a coil spring trailing arm rear suspension.
The good thing is you can tune the rear up with drop blocks if you want to drop the rear a bit more.
If you install new orig springs in the front run them for awhile until they settle in.
I found it took a few weeks and then you can set the rear for the rake you want.