thats odd i just checked 1stchryslerparts.com and again it didnt show any results for p4529419? are they available anywhere else? yes im deffinatly gonna try to stick with the roller cam. i havent had the heads checked yet but i heard they are notorious for cracking between the valves. hopefully mine will be ok i want to keep this build on the cheap. yes it is a magnum motor from a 96 truck i believe? if i find the lifters are in good shape then ill start shopping for a cam and pistons.