yeah, it would be difficult...at the very least you would need a late and some serious skills...but you could always contact crower or crane cams, sent them some stock cams to regrind at least to a more aggresive profile, but seriously consider the engine swap...even if you cant get a 2.4L to bolt to your tranny you can always use the RWD tranny from a Jeep Liberty...which will bolt to a 2.4....after all, custom cams are probably going to run you about $250 or more for one cam, but as far as custom making your own stuff, I was talking more like headers, etc...you might also want to try allpar.com and see if they have anything or any useful links