Proform for my car.
Easily adjusted without the 'pill'.
... and I'd have to believe that your HP curve is on the decline after 5K. Maybe someone here has a dyno sheet for the LT1. It'd be worth the effort to dyno, if you have a shop nearby, so you'd know. I spun the bearings on my L98 thinking it rev'd up into the 5K range and provided something for it. The dyno sheet told me different.
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