IIRC 5-90 said in another thread that it was OK to replace all lifters and rods without replacing the cam, assuming the cam is OK.
Yep - and I've done it in several vehicles, on several occasions.
Flat Tappet Commandments
1) Thou Shalt
Notinstall used lifters onto a new camshaft.
2) Thou Shalt
Not install used lifers onto a used camshaft, unless thou art certain beyond doubt that each lifter goeth upon the same lobe from which is was removed previously.
3) Thou
Mayest install new lifters onto a used camshaft without harm. It is preferred that thou checkest the camshaft to ensure that thine lobe lift is still within specification (and, if possible, check to make certain that thine lobes are still properly tapered to encourage lifter rotation.)
4) Shouldst thou note a gouge of any sort in the heel of thine lifter upon
any lobe of thine camshaft, thou shalt immediately make certain that thine
entire camshaft is not worn beyond service, nor that
any of thine lifter bores are burred or flawed in such manner as to prevent rotation of lifters.
5) Thou Shalt be certain that all of thine parts are clean upon reassembly. Perfectly clean.
6) Thou Shalt be generous with thine assembly lubricant. "Too much is almost enough." Assembly lubricant will dissolve in thine engine oil, and shalt not cause thine engine any damage.
7) Thou Shalt run a lightweight non-detergent oil (typically a 30ND) for thine first oil change, and thou shalt change that oil in five hundred miles/ten hours or less.
8) Thou Shalt follow any and all torque specifications, recommendations, and procedures incident to a camshaft or valvetrain component replacement, particularly if thee usest mechanical tappets.