One thing I forgot to mention in my past few posts.
69-72 Blazers use 7/16" studs, so you may have difficulty finding 7/16" lug nuts to fit late model rims, and in fact I'm not sure if they are even available . Late model rims use 14 mm studs.
Edit; I guess they are in fact available---->
https://lugnutguys.com/products/dual...en-end-7-16-20