Another BB swap 1970 Dart

Ad on craigslist mopars for sale in auto parts section a guy sellin a 1970 dart 1966 dart 4 speed and a 340 so i call the guy tells me to come look at the 70. a week goes by and never went and looked cause i work nights traffic alot better cooler and less traffic at ethanol plant cause we get payed by load so if u have 5 trucks in front of u at plant guess wat u are not gettin paid ,so any way i finally get a chance to go look at the car and its in really nice shape so i make my offer and he sas yes he will take it arranged a ride home for it and now its mine and im ready to begin my process once again, collecting parts for the BB swap. got a 72 400 from my 72 dodge truck i scrapped my truck about a year ago and took the engine and trans and radiator also. its been on engine stand for a year sittin in the corner covered up. i just wanted to make sure, do i still need the 187 pan for this one also. if i do i noticed my dipstick on my engine is made into the original pan on truck do i need to cut a hole and weld it like the original and if so how high pretty much the same as the old pan will have pics of car later today. thanks everyone good to be back on here doin my thing .