Fresh engine, wiped cam? Tick? (new pics added)

I dont think you will have to rebuild the hole engine....just fill it up with oil and maybe an engine cleanser such as sea foam and then drain it out....then install a new cam kit all matching specs and then run a new oil change on it.....do your cam break in and change the oil again and you should be good to go

it was either the rust on the lobes that kick started the problem or .....my guess would be.....since the block was decked and the heads were milled and you kept the stock length push rods....they were too long and created to much pressure on the lifters and was causing uneven wear