Conversion Oil Pan

for some reason I have a 420 pan in my duster and it fits just fine. full steering travel and didn't have to trim k member or anything. It does come close but it does fit. I used an old diredt connection big block K-member for installation. the 402 pan is from 68-69 440's and is I believe 6 quarts and baffled. I know it shouldn't matter but i do have late (74) spindles for the big bolt pattern conversion too. Car is an original 72 340 duster but now has a 383.