Many Questions...

Hey guys, i have an opportunity to get a 318 v8 with trans for my 73 duster. it currently has a 225 /6 in it, the price is right -FREE-

what all do i have to do to swap it out?? Ive heard that i can go with motor mount adapters, also do i need to change out the torsion bars if i keep it stock or maybe a mild build? I'm not sure wether it is a 727 or a 904, will either of them fit? Or will i need to cut out the tunnel? Also what would be an apporpriate size lift for a mild cam?

thanks a lot, any suggestions would be appreciated!!!

Mr. 7DUSTER3