[blykins]

Do you have the cam specs handy?

Believe it or not, you can have a mild cam but still have a lot of overlap, and it's common for both off-the-shelf and custom hydraulic roller camshafts.

The hydraulic roller for the FE is a catch-22.....you either have a cam that's a little lazier with a greater amount of overlap, or you have a cam that's more aggressive with less overlap.

If you have the aggressive cam, then you're automatically down 20 hp to a similar camshaft with a less aggressive lobe, and you have valvetrain/lifter noise.

If you have the lazier cam, then you're up horsepower, but you have a good bit of overlap that needs to be managed and your engine will buck at low rpms, even with a low duration.

It's taken me quite a few years to find out which lobes offer the balance of those two situations.

If you have the cam specs, including advertised durations, .050" durations, the LSA, and where it's installed, I can tell you if you'll have issues.