318 340

Ive been throwing different swap ideas on here and got alot of good info. So now ive come across a 340 block that comes with: the block,pistons/rods and crank with windage tray.(eagle rods with je pistons and the stock forged steel 340 crank). If i take this route, what parts can be swapped from my 318 onto the 340? pulleys,intake ect. (im pretty sure the intake corresponds) id rather ask some dumb questions now, instead of just making a possible dumb investment haha
any info or suggestions will be appreciated