LA 318 Cam / lifter gut check
yeah man, you're kinda in a spot here. i lack the machinist/metallurgy bonafides beyond saying that **** looks fucky, so besides a recommendation of checking the crown of the lifter, the aspect of the cam and rolling it around to make sure the lifters are rotating i don't have much else to offer.
as to the block, it may be a really really late FT block as they were transitioning into the roller stuff, but i would mos def pull the numbers and run 'em to ascertain what you have. incompatibility of parts would eat up some bits right quick.