Staggered tires or same all around? 1970 C20

[GMC69]

I am in the process of refinishing some late model 2500 rims for my 1970. Today I sandblasted them, and painted. Possibly will clear coat them as well in a few days.
Going for the old school look with new style rims. Rims will be white with chrome Center cap.

My question is tire size and type.

I was thinking 265/70r16 in the rear and possibly a 235/245-70r16 up front. Other size recommendations?
Regular highway tires or AT tires?
My daily driver is also lowered and I put AT tires on it and it looks pretty good.

The attached pictures are of the look I’m going for, my daily driver with AT tires and my white rims along with the centre caps I ordered.
Can’t forget a picture of the truck they are going on too.