340 Cam Kits which ones work with a stock block

I have the 484 at 238, 239 and 241 possibly operator error or MOPAR changing vendors

IN 68 Coronets case squeezing the Howard down to 108 gives him the choppy idle with more overlap AND allows him to get the intake closed earlier with his not super compression
He just designed a Whiplash...
now if that is the right size to begin with...
also examples
285 555
271 543 shown above
271 518
267 506
263 498
252 475
measure twice- cut once