The "apparent" problem with not using a small base circle cam is that the lifters are too tall and will come out of their bores on a non-roller block, I've heard that this is kind of a myth, especially on the 351W's. Just do a PKRWUD says and it'll work fine.
84LX89GT, small correction 82-84 5.0L had a flat cam with the 351 firing order and the 85 was the roller cam.
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393W: AFR 205's, hydraulic roller, TKO600.
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