ok i got a 350 out of a van that was TBI. when i took it apart it had solid lifters and cam but ive heard most TBIs were roller cams. how many bolts hold the lifter retainer on? theres 2 spots on the block where it would mount and it looks like they broke bolts off in there.
and is it possible to drill and tap the holes and buy the parts to make my block a roller block?