I have 83 k5 blazer with 15x8 rally rims with 4" backspace I would like to know which newer factory alloy wheel fits 16" ? 17"? backspacing 4" max on 15" larger diameter may clear does anyone know what fits without spacers you can find factory wheels real cheap

 

Larger diameter should clear brake components easily. After you find a rim you like you can just google "99 tahoe 17" back spacing" and probably find the back spacing

 

That would be a great suggestion go for the same.
www.usarim.com