All 1970 383's get the 402 stamp # oil pan when in E bodys.L code 2 bbl and 330 horse N codes do not get the windage tray that goes between the pan and block.
In 1970 T code 440's have different horse power ratings as well.The most common one is the 440/350 ...single exhaust,single snorkel ,stnd cam versions.Sport Fury GT's, Wagons and Fleet cars get the other version....dual exhaust,dual snorkel,stnd camshaft,stnd valve springs which was still advertized in the 1970 factory Fury literature as a 440/350...seen it advertized in Chrysler literature as a 440/360 or 440/365...have to look it up.When I get some time tonight I see if I have some broadcasts with other N code variations an post them.