I assume you mean hydraulic roller. To make one fit you'll need either a retro-fit roller kit and cam or buy the retro roller lifters from Crane and run any hydraulic roller cam. The lifters are expensive but no machine work is needed to make them fit the block and no special cam is needed when using those. If you do the retro roller kit you have to have some machine work done to the block and purchase a smaller circle base cam to fit with those.
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