Which word would you select for proper grammar in the sentence below?

If I was [a] OR were [b] you, I would ask for a raise.

I would select "were" (option b) for proper grammar in the sentence:

"If I were you, I would ask for a raise."

The correct word for proper grammar in the sentence is "were" [b].

The sentence should be: "If I were you, I would ask for a raise."