As far as the oil pan goes on this D100 slant six to 440 conversion:

I know a guy that said his dad had a "402" pan on a 440 in a 65 D100 and that worked out OK.

Can I use a "402" pan and move along with this conversion or am I in need of the rear sump pan?

I also read in a Dodge Sweptline forum that an owner of a 67 383 CSS truck had a front sump pan in his truck from the factory.

Is a 402 pan considered a "front sump" If not, what applications of vehicles using a BB would have a front sump pan?

having a hard time sourcing a BB rear sump pan.

Thanks