New to the mopar world,Need help with 318 build..pleeasse..

Looks like imma stick with millin the heads for now,and try n find an air gap intake,or try to find a big block on the cheap,i know how to weld,and do other things,has anyone here ever done a big block swap,whats needed,besides different tranny/driveline? oh and no wife lol,only 19,dont plan on it anytime soon,yea gas is pretty high right now,but im "young n dumb",just wanna smoke some mustangs,(as i live in mustang land),n my neighbors falcon which he stuck a number of 435hp/435ft/lbs in his mind and keeps going around with,saying my swinger is a piece of $@&%,mostly wanna shut 'em up,and build something fun to drive around town,a cruiser but with good power.