C/K1500 Stance Question

[weedoublewide]

Hey everyone,

I got a question....I have a 1970 gmc and I'm trying to decided what i want to do with the wheels and tires and stance because that will tell me what kind of disc brakes to get...

Attached is my truck(white mirror) and one i found online (random person thank you for you truck).

Im found of the slightly more aggressive look. Im not a big fan of drops. But if i have to drop the back slightly to accomplish what i like, i will.

I was wondering what size tires and wheels would make look more full, not like someone who skips leg day in the gym. but not so much where it looks like its over compensating for something. It has 15 in rims with p235/75R15 right now.

I uploaded 4, first two are what im drawn to.

If theres anyone out there whom has accomplished this or knows a thing or two about stances and wheels and tires. Im all ears!

Thank you in advance.