Not Ranked
I have a pretty hot solid roller cam in an FE. It idles fine at 1000 RPM and above and cruises just fine with 0.82 OD and a 3.54 rear, which turns the engine at about 2400 RPM at 70 MPH. The engine will cruise just fine down to about 2000 RPM but below that it's not as happy. To me, the tradeoff is less torque and lower RPMs and a higher RPM range and more power up top. But it's definitely driveable.
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