lowering/wheel tire compatibility?

[Root_Drum_Co]

I purchased my first truck a few months back its a 69 gmc stepside. I am at the point in my build where wheels, tires, and ride height are on my mind.

I would like to stuff some 15"x10" vette rallys under it with a 2" drop all around to keep some rake. I've ordered my drop springs for the front and I'm thinking about drop shakles for the back. Also thinking about white letter radials for it p.s.

What i guess i need to know is-

-will 15"x10" rally's with a 4" backspace rub?
-what tire size will fit, and look the best?
-will they stick out at all?

If you guys have any advise i would love to hear it. and i would LOVE if someone had a bunch of pictures of this combo so i could vizualize it haha.

Thanks guys!


'69 gmc stepside
'76 Triumph TR-6