Whats the deal with 340s?

Mopar Tim said

And the roller valve train, And the increase in compression, Much better tolerances from the factory. And the magnum heads are not bad factory heads.

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You can put a roller valve train in a 340.

They hydraulic roller is pretty much useless any more. If my customers want a roller tappet for a performance engine. They get a solid roller.

A hydraulic lifter, is a hydraulic lifter.