When I was talking to Bob Madura last week, we were thinking the lift would be in the lower-mid .600 range. I haven't made my mind up regarding the cam just yet (I'm in "inventory" mode right now), but I know the 731 works for a lot of people. Good to know that it will fit without too much difficulty.

Also, this is going to be a blown setup. I don't think the 2.19 intake will hurt it. Agreed that the 2.19 works much better on the smaller bore of the 454.

Tom knowing what I know in my opinion anyone building a marine engine if it be a max effort or a mild "warm up" would be foolish not to buy a cam from Bob. I've had some lengthy technical discussions with the man and believe me his depth of knowledge goes much farther than what most of us know. If you are trying to get everything out of the combination you have his camshaft is the only way to go.

Agreed. And he's done my cams before (I have one of his SBC cams listed in the Swap Shop). I was just looking at generailities. I know Bob will set me up the right way for sure.

Does anyone have any proven data that shows a 2.19 valve works better on a 454 than a 2.25? What cylinder heads are we talking about here? A small oval or GM rectangle port, or aftermarket rectangle port?

I read where a guy did some flow bench testing, and by simply moving the head over some on the stand was able to gain 12 CFM. The context being that moving even the 2.19 valve away from the cylinder wall picked up some airflow.