First year for hydraulic roller lifters was 85, mid year introduction. EF is wrong. You can run regular flat tappets if you want to, BTDT. In fact, if you look into it the 87 318 2bbl (for example) came with a roller cam, whereas the 87 318 4bbl cam with a flat tappet cam, same block though. Other things are different but not the block. Now you CANNOT run an OEM roller lifter in a non-roller block, but that's another issue. You will also need to run the flat tappet pushrods.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.