Aluminum RRs good for only 20-30K miles??

[Chevyguy]

Spring pressure, hmm we may be on to something here.

I had this thought last night, what about the 96 LT-4 engine in Vettes or in some 97 F bodies. They have Alu rollers from the factory, would seem hard to imagine less than 100K mile durability for a factory install, but maybe they figure nobody will notice the trunion wear?? Maybe valvetrain geometry has a role, I know the LT-4 motor uses a very light valve/spring/retainer setup

I am puzzled now

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