shimming hydraulic roller lifters solid

On a 5.9 build we did long ago we used a Luniti Hyd Roller cam, close to this one at 292/305, Advertised Duration (Int/Exh): 294/302 ;Duration @ .050 (Int/Exh): 243/251 ;Gross Valve Lift (Int/Exh): .560/.565 @16:1 ratio rocker
We took some cold rolled thich wall tubing and turned it down, height and diameter, to press fit inside a set of Melling replacement Magnum roller lifters. Drilled to the side for oil feed. Had the tubes slightly heat treated. Then used just the modified cap for the pushrod tip. Stock spring retaining clip.

Also did a fine line grove down the side of the lifter from the oil gallery area down to the roller ball so it was fed oil.

I do not remember what roller rocker he used but it was an easy lash adjustment. NO pump up.

The weight of the hollow tube was less than the piston and spring by quite a few grams each