Check all your lifters to make sure they have a crown.
Easy way is to place the cam end of two of them back to back and make sure they rock and are not sitting against each other flat.
Also be sure to check your cam to make sure there is no casting flash on a lobe sitting up proud of the machined surface.
Once the short block is together, mark each lifter at the top with a marker, then spin the engine over. Each lifter should rotate in its bore the same amount when the engine is rotated.
If one or more isnt rotating dont go any further until it is fixed or it will wipe out a cam lobe.
