Old engine with solid lifters being driven shortly after getting it started without running it back in without revving it and checking for proper lubrication after years of sitting is never a good idea. If you are lucky, you will be able to get away with just new pushrods (to replace the bent ones), lifters, maybe a few rocker arms, maybe a cam, possibly a replaced valve or two and a timing chain. the lifters in the block could be stuck, the valves in the head could be stuck and bent. Unlike hydraulic lifters, solid lifters are unfogiving. Any of those components jamming will cause and old timing chain to jump time.
