Magnum roller camshaft

6PakBee said

Anyone got an idea how much lift the stock roller lifter spider based retainers can handle? I would think that there is a point where the spider can't control the lifters and you have to go to the link arrangement.

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I don’t think the spider has issues. I think the oil band on the lifter body will, but at what lift I do not know. The lifter bores are much more uniform as compared to the earlier LA engines and much taller. Again, how much lift hey can handle I do not know. But Sam’s kids run a good bit I see.

If there is any problem to running a high lift, I don’t think you’ll find it at the cam, lifters or spider. The heads, if stock, have lower lift limitations.