The old 5.0 Mustangs of the late 80's and 90's all had OEM roller cams. I owned one of those and loved it. The motor didn't burn much oil at 180k miles and still ran like the day I bought it. But that's just my experience, and that roller cam wasn't a high-lift cam.
Dan, what about ramp rates and side-loading of the roller lifter with steep rates?
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