4 Inch Drop in rear, what's needed to do it right?

[Yamariv]

Hey Guys, new to the forum! I just picked up my 71 C10 to restore, Pics and more info in the intro thread I posted

https://67-72chevytrucks.com/vboard/...d.php?t=839908

Anyway, I want to do a 3 front/4 inch rear drop on my truck, not too much but just a little, I would like to keep a bit of the rake it has. I'm thinking of going with a 3 inch drop spindle in front so I keep my same suspension geometry, springs and shocks.

The back is where I'm stuck, and not sure how to do it right. I was thinking a 4 inch spring drop(I have coils, not leafs) If I do that, what do I need?

-Do I need shorter shocks or a shock relocation kit?
-Please tell me I don't need to C Notch as I'd like to keep the frame stock.
-When would I use lowering blocks on a drop?
- Is 4 inches going to screw up my drive shaft pinion angle?

Thanks in advance for any help with this!