Help with ride heights

[Hideintire]

Hello! Would a few of you folks with 4/6 drops measure and give me very accurate dimensions at front and rear from floor to a repeatable point on chassis. I would also need your tire diameters front and rear. Please pick a point on chassis that I can repeat on my end. I would be grateful!

Also, is a 4/6 drop very streetable? No serious issues in daily driving? I'm piecing together a 68 shortbed and trying to decide suspension front and rear. I know it's hard to beat the stock setup...but I'd like to put a C4 front and rear in this truck. And, yes I know there are companies out there that sell kits...but the fun part for me is building it myself.

Again, I'd be grateful for your time and input.
Jim