Big Block oil pan for A body

I hope you guys can educate me on this.

I have read/heard that the 187 and 699 pans will work on a BB swap in an A-body. How about the pan that is similar - but is not stamped with a number - such as a 1965 383 pan? It looks very similar, but definitely not exact. The "notch" is not as great.

Also, If I purchase and use this pan (or even the 187 or 699) which pickup would I need? Would it be the same as the 402 pan pickup?

Help. I have an opportunity to purchase a clean non-stamped pan similar to the 187 and 699.