bottom line is both swaps need the same basic parts. doing it right isn't going all out. but doing a "right" small block build is putting disc brakes and atleast a 8 1/4 rear in the car. both need a rad, both need motor mounts, both need headders/manifolds, yes you can get small block headders for $150 but they are the ones that hang low and i will never use them again. both are gonna need a trans/converter. they both need hoses and belts and plugs. pullys are hard to find that are non a/c for both. both are repoped also.
and i beg to differ on the 340/440. even a motor home motor is a 440. people here 440 and the price goes up. they are the desireable big block. i paid $500 for the 360 in my car. it came with a 727 also but i haven't used it yet. a friend just got a running 440 and 727 for $700 and put the motor in his charger. nothing more then a clean and paint, put his headders on and his alumn intake and is driving it. damn thing runs as good as my 48,000 mile 360. so your talking $200 difference. thats nothing when your talking about a swap like this.