If it's a stock motor they are Hyd. But a way to check is to push in / down on the center of the lifter If it is out of the block it won't be that easy but it will move if it is hyd. It can also be tested in the block But you would have to losen the rocker and have a way to push or pull down on the rocker& push rod. Hope this helps. }[oooooo]
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NovaMan/Twisted6/Larry