back into cars,yay !

400HP is easy. http://www.popularhotrodding.com/enginemasters/articles/mopar/0667em_mopar_318_engine/viewall.html
that's just one way.

seriously though... i'd leave the 318 in her for now. get a used 360 somewhere. build that sucker up. then swap it in. you will get more HP for less money. it wont take much to hit 400HP with a 360. heck you could even put a stroker kit in the 360 and get close to 500.

it's all what you want to put into it, really.
Really would like to use the original motor as the 318 is internaly balanced for the 904,thinking or a 4" stroke but have been told that the cam would sound smaller,can't have that lol,need that mopar sound,the local machine shop said the builds from mopar muscle magazine,popular hot rodding and car craft are not correct.