VVEL cannot safely give you the lift/duration you need which is why you you need the HR heads. It may well be able to do it BUT the investment needed would be significant - easier to go HR head conversion, but that means non-OEM ECU which gives your all the local road/licensing/inspection authority problems.
All the Grand Am engines make 400whp and not one of them retained the VVEL.
None of the choices are easy.
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