Engine rattle

im not trying to hijack your thread. im having the same exact problem with my 77 360. new cam and lifters, great oil pressure, lifters were manually pumped up before install, new rockers and shafts, pushrods all measured out exact. i have valve train rattle i cant get rid of. oddly enough, it is most noticable above #6 and # 8 so im watching this thread intently