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Always opt for the billet cores when doing a solid roller.
If you're definitely looking to swap, you need to subtract about 10-12 degrees duration to match with a hydraulic roller (no lash to take up on a hydraulic cam), so you need something in the 238-242 range on .050" duration.
I like the XFI lobes for the Windsor strokers.
I'm a Comp Cams distributor, I can get the perfect combo for you including lifters, springs, retainers, etc. all in a package deal.
The Mutha Thumper cams sound nice, but there are better performing cams out there. They use a real right lobe center, which offers a lot of overlap (cammy sound).
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