At what point do you worry about have a water reversion problem in your exhaust system. Stellings headers and tail pipes. Water enters the tail pipes about 16 inches away from the header were it meets the tail pipe.

It depends on how much overlap the cam has

It has a over lap of 90.0 degrees

I would go back and check that number

That's what it comes up to be in the calculation online. It's 264/272 @ .050 on 114 LSA. It said to put it in as advertised duration

40* overlap at .050"
No way to find overlap at seat without those #'s.

That's some big duration for a marine cam.
high compression and race fuel?

OK got my cam card out today. Is there a particular number to look for when it comes to reversion

40* is a lot of overlap and likely to revert water with wet exhaust. Most marine cams are 20* or less.
It will also depend on how many cubic inches you have. A cam that reverts in a 502 might not in a 540 and will be mild for a 572.
Camshaft Overlap Calculator - Wallace Racing

Thanks for the input. Not looking to change cams or anything just trying to avoid a problem in advance. Was not wanting to have to change my tail pipes because they have built in mufflers but it looks like I don't have a choice all good.