One needs to be careful when playing the "My people where here first!" game
I personally don't care who got where - but there is a tribe in Argentina or Chile in the hills that is not mongoloid and is traceable back around 10k years up through South/Central America
I always figured a polynesian background for the original ancestors - the true Incas (royalty) were near 6 foot tall - but the Spanish Conquistadores killed everyone over 5 foot tall. That left the current central/south american indian
There are plenty of pre-colombian tales of groups that looked very different from one another from blonds and red heads to very dark skin but not African possibly from India. Or perhaps some thing else entirely different. Of course there are the Omlec's who's stone heads look Polynesian or African. And the Zuni's who are as different from the surrounding tribes as the Basques are from their neighbors in Europe.