Help need new fan and have some questions

[Navy_chief]

Guys,
I am going back all stock on the Desert Fox right now it has a piece no a pile of #$&^ fiberglass fan blade attached that is all cracked.

I have a 1977 GMC factory 454 radiator that I will be putting in place of the aftermarket piece of %^&* plastic side tank radiator.

Anyways I am needing to know what the stock fan set-up should be on the 1977 GMC SB 400 with factory air and which way rotation wise it should go I.E. Normal or reverse the engine has the long water pump also a 5 blade or 7 blade I also still have the facory fan shroud in place any help would be greatly appreciated.