Big Block into 1970 Swinger

well for rearend at least my c body axles couldnt be shorted because there tappered i think is the word i want to use. But i did use the brakes center section and housing. I dont know anything about 413 but i have seen BB 3 speed cars on here. For the motor I would fig out if you can make the mounts or find someone that sells them I am pretty sure no one makes them :/
Another thing would be will manifolds fit or will some kinda header fit?
Other then that bigger radiator disk brakes sub frame connectors. valve covers depends on if you can have heat, mounts, exhaust(headers/manifolds), upgrade the manifold and get a 4 barrel carb of whatever your heart desires :P