back into cars,yay !

Going back to the high school days of the hot rod,back then it was a 55 Chev two door hard top with a 67 vette motor 327 4-spd,two years ago bought a 72 dart swinger (new orange paint,white vinyl,top black hounds tooth,318 auto,new chrome bumpers with rally wheels and dual exhaust,all original ) from a neighbor of 20 year who past away of cancer,trying to keep his dream alive by keeping it nice and driving it and letting my step boys 19 & 16 use it on special days like graduation for good times,BUT it sounds like a stock 318, need the sound of a good cam etc.Want to rebuild the motor as it has 160 k miles, would like to make it a sleeper,talked to two shops about the 400 HP build they said no way,what do the people of fabo say, they even asked a rep at comp,he said about 300 hp,like this a-body site lots of good info,thanks for your input,sleepyswinger