New to big blocks.....info needed please, lots of newbie questions

Hi Guys might consider a 440 swap in my 71 cuda , im in the small block mopar since the last 18 years....have a hard time with all the 440s infos out There, was going with a 360 magnum with my car but its growing on me , i think that even a smog 440 with cam , carb , intake and headers cant achieve 400 hp and 500 torque for less than a small block and Cheaper..im just lost with the low compression 440s and what heads/cam compression is needed bla bla bla , i was shooting for a close to factory stock as possible to be Very reliable , dont want fancy roller rocker stuff and rare aftermarket items....already shooting for a summit6401 cam and a holley 750 dp and headers, car will be a ligth 71 cuda with highway gears 3.23 max and 4 speed or reverse manual valve body with a stall....my goal is a 3 000 pound car with torque and good street manners and pump gas !!!!let me know your combos , i have 5 engines in my area all from 72 to 1980...for cheap, im on a very limited budget ! Ps* always had 5.2 and 5.9s.....Can i buy an aftermarket cam and use new oem stock replacement lifters ?

Wow, 3000 lbs? You are going to really have to gut a lot of metal, use a lot of fiberglass parts and remove a lot of other things from a '71 'Cuda to get down that weight.