Id be sure it's a roller block because they didnt go roller until 93 (in trucks).
What did it come out of??
Also if its not roller and you want the roller cam to work your looking at a $500 set of lifters. If the block is bare check to see if the lifter galley has been machined for lifter guides.
Keep in mind that non roller camshafts use an iron distributor gear. Roller cams use a steel gear. Anytime you swap cam types, you need to swap the distributor gear to match.