short travel lifters, better pushrods and billet cam core. all good but the oil pump of a stock 5.7 isnt gonna be pusbing the oil needed for the non mds lifters setups. why many lose aftermarket cams in baic 5.7 or 6.4 vvt engines...my theory anyways.
my stroked 6.4 idles rather quiet compared to wifes daytona for a 650+hp engine before boost. yet i have high flow/presure hc pump, billet cam.core, the short travel hd aftermarket lifters, locked out vvt, etc..