Hughes cam?

Bewy said

With cams, very close is a long way off. With FT cams, there is only a certain rate of lift that can be attained, governed by the lifter diameter, before the lifter edge digs into the lobe....& that limits total lobe lift for a given duration.

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I hate duplicate typing posts, but a flat tappet cam, especially a .904 lifter specific will actually out-accelerate a roller. Fact. A roller can maintain it's lift rate for a longer period of time however, thus continuing & then maintaining a longer upper-lift curve, that's it's advantage.
When I attempted to use the 26918 Comp PAC Beehive for an LS on an FE/MX/MM Comp lobe, it was a big NYET, even though it was fine for an LS roller cam with 1.7 or even 1.8 rockers. Comp said those lobes, Ford & both Mopars, required what at the time was the "new" race LS Beehives to get it done...whether 1.5 or 1.6 rockers.