Big Block oil pan for A body

Kinda depends. And there might be slight clearance differences between 67-72 and 73 and up steering linkages. The pan definitely needs a notch but it doesn't need to be as big as the one on the 187.

On my '70 where the idler swings into the notch, I actually had an issue with it grazing the corner of the notch (circled in the pic) and had to clearance the pan slightly.

You can use the standard passenger car pickup for a 440 or an aftermarket one intended for a center sump. I think the last one I got was #121-1055 from 440Source ($20).