15X10 wheel fit 1980 c10 without tubbing

[80c10]

I have recently bought a 1980 c10 swb stepside, and im looking forward to putting some weld racing pro star's on it. I want to do 15 x 8 in the front and 15x10 in the back is it possibly to fit the 15x10 in the back without doing any tubing what so ever. If yes can anyone give me all the information i need before buying the wheels (bolt circle, backspacing and what not). Sorry if i sound like an idiot first time buying aftermarket wheels for a truck! I wanna make the truck look sick ! i added a picture of how it sits now