Yes. They usually come with enough ~.015/.030/.060"shims to do the job (the stock ones are .040"). The fancier ones have a fixed spacer tube between the intake rockers, but most use one that floats. You want .004-.006" side clearance on the exhausts, and on the intakes with the fixed spacer. With the floating spacer, the intakes can "share" it so less is acceptable, say .006-.010". There's enough slop in the mounting holes to upset the settings any time the shaft is removed/installed...after running the nuts down lightly you can tap on the end(s) of the shaft to shift it until the exhaust sideplays are equal again.Big Ratfink wrote:I will order a solid rocker kit with extra shims. I think this is cheap insurance..
Watch out that the shims over the rocker stand/shims don't make contact at the bottom. Grind a small flat on any that do.
So, when installing the rocker assemblies for the final time you've got to keep an eye on the balls so they don't turn over as you're engaging the pushrods into the cups, and on the shims so the flats stay "down" - not that hard if you hold everything pinched together by pushing inward on the exhaust rockers until the shafts are in place.